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    Wyświetlanie 1-43 z 43
    Tytuł:
    Effects of ship motion on acoustic remote sensing
    Autorzy:
    Tegowski, J.
    Zielinski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/332057.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    ship motion
    acoustic remote sensing
    Opis:
    Ship motion affects quality of acoustic data collected by various acoustic remote sensing systems used for bottom and fisheries surveying. The angular position of an acoustic beam changes in time from its nominal position vertical to sea surface. This motion affects the acoustic returns from the bottom and other targets by changing their intensity and arrival times. In this paper we illustrate these effects on bottom returns obtained using single beam sonar.
    Źródło:
    Hydroacoustics; 2003, 6; 205-214
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New concept of numerical ship motion modelling for total ship operability analysis by integrating ship and environment under one overall system
    Autorzy:
    Olszewski, H.
    Ghaemi, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/259338.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship motion modelling
    ship operability
    total system
    Opis:
    The paper presents a new concept of overall ship motion modelling for application to total ship operability. The delivered model is a multi-phase and includes both submerged part of ship’s hull and the surrounding water as a unique body. The Discrete Finite Element Method is applied. The model is successfully examined and illustrated for a selected AHTS.
    Źródło:
    Polish Maritime Research; 2018, S 1; 36-41
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Algorithm for Interpolating Ship Motion Vectors
    Autorzy:
    Hu, Q.
    Cai, F.
    Yang, C.
    Shi, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/116863.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Ship Motion
    Ship Motion Vector
    Automatic Identification System (AIS)
    AIS Dynamic Information
    Algorithm, Ship's Acceleration
    AIS Data
    Vector Function
    Opis:
    Interpolation of ship motion vectors is able to be used for estimating the lost ship AIS dynamic information, which is important for replaying marine accidents and for analysing marine traffic data. The previous methods can only interpolate ship’s position, while not including ship's course and speed. In this paper, vector function is used to express the relationship between the ship’s time and space coordinates, and the tangent of the vector function and its change rate are able to express physical characteristics of ship’s course, speed and acceleration. The given AIS dynamic information can be applied to calculate the parameters of ship's vector function and then the interpolation model for ship motion vectors is developed to estimate the lost ship dynamic information at any given moment. Experiment results show that the ship motion vector function is able to depict the characteristics of ship motions accurately and the model can estimate not only the ship’s position but also ship’s course and speed at any given moment with limited differences.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 1; 35-40
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of the theory of ship’s motions on gyrocompass operation
    Autorzy:
    Lushnikov, E. M.
    Pleskacz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/359270.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    ship's motion
    gyrocompass
    accuracy
    wave action
    gravity
    Opis:
    The article presents the results of compliance with effects of impact wave course and the resulting orbital motions on the accuracy of the gyrocompass.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 2; 110-113
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of lake waves to simulate environmental disturbance to a scale ship model
    Autorzy:
    Rak, Andrzej
    Miller, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/34614624.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    wave modeling
    environmental disturbances
    scale ship model
    ship motion simulation
    Opis:
    In the development of ship motion control systems, software simulations or scale model experiments in pools or open water are very often carried out in the verification and testing stages. This paper describes the process of building a software wave simulator based on data gathered on the Silm Lake near Iława, Poland, where scale ship models are used for research and training. The basis of the simulator structure is a set of shaping filters fed with Gaussian white noise. These filters are built in the form of transfer functions generating irregular wave signals for different input wind forces. To enable simulation of a wide range of wind speeds, nonlinear interpolation is used. The lake wave simulation method presented in this paper fills a gap in current research, and enables accurate modelling of characteristic environmental disturbances on a small lake for motion control experiments of scale model ships.
    Źródło:
    Polish Maritime Research; 2023, 3; 12-21
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of seakeeping performance for a case study vessel by the strip theory method
    Autorzy:
    Niklas, Karol
    Karczewski, Artur
    Powiązania:
    https://bibliotekanauki.pl/articles/1573815.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship design
    seakeeping
    ship motion
    added resistance
    towing tank
    strip theory
    Opis:
    The increase of seakeeping performance is of particular importance for car and passenger ferries, service ships in the gas and oil extraction industry and offshore wind power farm industry, as well as for special purpose ships (including military applications). In the water areas of the Baltic Sea, North Sea, and Mediterranean Sea, which are characterised by a short and steep wave, the hull shape has a substantial impact on the operational capacity and propulsion efficiency of the ship, as well as on comfort and safety of navigation. The article analyses selected aspects of seakeeping for four variants of a selected case study vessel, indicating practical limitations of the strip method. The analysed aspects included hull heaving and pitching, added resistance, Motion Thickness Indicator (MSI), and Subjective Magnitude (SM). Experimental tests were also performed in the towing tank. Their comparison with the numerical results has indicated high inaccuracy of the strip method. What is more, the simplified representation of hull shape used in the strip method makes it impossible to analyse the effect of hull shape changes on the predicted seakeeping characteristics. Especially for the case of head wave, neglecting highly non-linear phenomena, such as slamming or head wave breaking, in strip method-based computer simulations will significantly decrease the reliability of the obtained results. When using the strip method, the seakeeping analysis should be complemented with model tests in a towing tank, or by another more complex numerical analysis, such as CFD for instance.
    Źródło:
    Polish Maritime Research; 2020, 4; 4-16
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-dimensional coordinate estimation for missing automatic identification system (AIS) signals based on the discrete Kalman filter algorithm and universal transverse mercator (UTM) projection
    Autorzy:
    Jaskólski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/135285.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    AIS
    Kalman filter
    AIS data estimation
    data fusion
    ship movement prediction
    ship motion tracking
    Opis:
    Due to safety reasons, the movement of a ship in coastal areas should be monitored, tracked, recorded, and stored. The Automatic Identification System (AIS) is a suitable tool to use in performing these functions. The probability limit for the AIS dynamic data availability can be limited by the lack of a Global Position System (GPS) signal, heading (HDG), and rate of turn (ROT) data in the position report. The unavailability of a data link is an additional limitation. To fill this gap, it is possible to attach the discrete Kalman filter (KF) for the position and course estimation. Coordinate estimation in the absence of a transmission link can improve the quality of the AIS service at Vessel Traffic Service (VTS) stations. This paper has presented the Kalman filtering algorithm to improve the possibilities for ship motion tracking and monitoring in the TSS (Traffic Separation Scheme) and fairways area. More than 570 iterations were calculated and the results have been presented in figures to familiarize the reader with the operating principle of the Kalman filter algorithm.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 52 (124); 82-89
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Niezawodność operacyjna skrzyżowania tras morskich : podejście symulacyjne
    Operational reliability of ships route crossing : simulation approach
    Autorzy:
    Blokus-Roszkowska, A.
    Smolarek, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/311395.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    transport morski
    skrzyżowanie tras żeglugowych
    ruch statku
    martime transport
    ship routes' intersection
    ship's motion
    Opis:
    Transport morski odgrywa niezmiernie istotną rolę i jest podstawą handlu międzynarodowego. Wraz ze wzrostem natężenia ruchu morskiego zwiększa się potrzeba dalszego podniesienia bezpieczeństwa na morzu. W artykule przedstawiono model opisujący ruch statków skrzyżowania dróg morskich pod kątem niezawodności operacyjnej. Rozważamy klasyczne skrzyżowanie tras żeglugowych oraz rondo przy założeniu pierwszeństwa z prawej oraz pierwszeństwa na rondzie. System traktowany jest jako wielostanowy model z stanem niezawodności oraz stanem zawodności z zerowym i niezerowym czasem odnowy. Do opisu ruchu statków w pracy zastosowany został model prostego automatu komórkowego, który stanowi podstawę symulacji. Ruch statku określony jest poprzez jego kierunek, prędkość i długość statku. Obszar skrzyżowania oraz trasy podzielone są na komórki. Rozmiar komórki zależy od intensywności strumienia ruchu, prędkości poruszania się oraz rozmiaru statków. Przeprowadzono symulacje ze względu na zmiany natężenia ruchu na kierunkach kolizyjnych oraz statystyczną analizę wyników symulacji. Wnioski i uwagi końcowe wytyczają dalszy kierunek prac.
    Maritime transport is of great importance as it is the basis of international trade. Together with the growth of maritime traffic intensity the need of further safety development at sea is increasing. In the paper the model describing ships' motion at routes crossing in terms of operational reliability is presented. There are considered classical ship routes' crossing and roundabout with two vessel priority scenarios. One assuming priority of vessel being on starboard and second assuming priority of vessel being on the roundabout. The system is discussed as a multistate model with reliability state and unreliability state with ignored and non-ignored time of renovation. In the paper for the description of ships motion the simple cellular automaton model, that provides the basis for the simulation, is applied. The motion of the ship is determined by its direction, velocity and length of the ship. The traffic lanes are divided into cells. The length of the cell depends on the flows' intensities, vessels' velocities and size. The simulation is performed on account of traffic flow intensity changing and statistical analysis of simulation results is given. Final conclusion and remarks outline further work development.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2013, 14, 3; 655-663
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fuzzy control for ship motion
    Autorzy:
    Broel-Plater, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/320954.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    nawigacja
    sterowanie rozmyte
    ruch statku
    wiatr
    navigation
    fuzzy control
    ship motion
    wind
    Opis:
    In the article a fuzzy-logic based algorithm for ship motion control is presented. The system operates in an open-closed loop control system with set-point changes and wind action being compensated. a detailed description of the feedback loop controller is given. The controller has a hierarchical structure, in which independent coordinated fuzzy-logic controllers for vessel motion components are situated. The controllers perform in two modes: as velocity controllers and position controllers. The paper is completed with computer simulations.
    Źródło:
    Annual of Navigation; 2001, 3; 31-40
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variations of Ship’s Deck Elevation Due to Stochastic Process of Containers Loading
    Autorzy:
    Krata, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/116250.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Containerization
    Containers Loading
    Ship's Deck Elevation
    Stochastic Process
    ship's stability
    Container Terminal
    Ship's Motion
    Cargo Loading
    Opis:
    The stochastic process of container loading is described in the paper with special emphasis to ship motion when she is lying at a quay. The 3 DOF system was applied to describe rolling, pitching and heaving of a vessel which may cause a significant variations of momentary deck elevation. The realistic range of such variations are assessed for a variety of cargo locations on-board and a phase shift between two independent gantries engaged in cargo operations. The process is modeled with regard to random character of crucial variables affecting ship motion due to cargo loading.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 4; 467-473
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A formal description of navigational process
    Autorzy:
    Jackowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/320952.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    nawigacja
    ruch statku
    sterowanie
    modele matematyczne
    navigation
    ship motion
    steering
    mathematical model
    Opis:
    In this paper there is undertaken an attempt to present the formal description of the ship’s navigation process. This formal description takes into account not only all the most important ship’s characteristics that influence the ship’s motion but also all the most important environmental characteristics influencing the ship’s behaviour at sea. The formal description comprises the following issues: ship’s navigation process, navigational information, dynamic of the ship’s motion, equations describing the ship’s navigation process, and mathematical models of ship’s navigation process.
    Źródło:
    Annual of Navigation; 2001, 3; 41-74
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the wind influence on the ship turning manoeuvers on port turning basins
    Analiza wpływu wiatru na manewr obracania statku na obrotnicy portowej
    Autorzy:
    Kornacki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/360385.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    manewrowanie statkiem
    ruch statku
    hydrodynamika statku
    aerodynamika statku
    wiatr
    ship manoeuvring
    ship motion
    ship hydrodynamics
    ship aerodynamics
    wind
    Opis:
    The paper presents the problem of the wind influence on a ship during the turning manoeuvre and the influence on this manoeuvre. Attention has been paid to the necessity of attaching larger attention to the influence of the wind during the turning manoeuvre. The analysis of the wind influence on this manoeuvre has been conducted.
    W artykule został podjęty problem oddziaływania wiatru na statek podczas manewru obracania i wpływ na ten manewr. Zwrócono uwagę na konieczność przywiązywania większegoznaczenia na oddziaływanie wiatru podczas manewru obracania. Przeprowadzono analizę wpływu wiatru na ten manewr.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2008, 13 (85); 40-44
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Integrated Model of Motion, Steering, Positioning and Stabilization of an Unmanned Autonomous Maritime Vehicle
    Autorzy:
    Gerigk, M. K.
    Wójtowicz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/116950.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Ship's Motion
    Ship's Steering
    ship's positioning
    Ship's Stabilization
    Unmanned Autonomous Vehicle (UAV)
    Maritime UAV
    Integrated Model of Motion
    Steering
    Positioning and Stabilization
    Hydrodynamics
    Opis:
    In the paper the aim of an interdisciplinary research is presented. The research method is introduced. An object the unmanned autonomous maritime vehicle is briefly described. The key research problem concerns a combined model of the vehicle motion including the loads of lift and hydrodynamic nature. The model takes into account the gravity and displacement forces, resistance and thrust forces, lift and other hydrodynamic forces. One of the major research tasks is to precisely predict the position of the vehicle. To do that an integrated model of acquiring, analyzing and processing the signals is necessary. The processed signals may then be used for the precise steering of the vehicle. The vehicle should be equipped with a stabilization system. Some information on an integrated steering, positioning and stabilization system of the vehicle is briefly presented in the paper. Such the system enables to obtain a fully autonomous vehicle. Some information on the propulsion and underwater energy supply systems are presented in the paper, too.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 4; 591-596
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reinforcement Learning in Discrete and Continuous Domains Applied to Ship Trajectory Generation
    Autorzy:
    Rak, A.
    Gierusz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259073.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship motion control
    trajectory generation
    autonomous navigation
    reinforcement learning
    least-squares policy iteration
    Opis:
    This paper presents the application of the reinforcement learning algorithms to the task of autonomous determination of the ship trajectory during thein-harbour and harbour approaching manoeuvres. Authors used Markov decision processes formalism to build up the background of algorithm presentation. Two versions of RL algorithms were tested in the simulations: discrete (Q-learning) and continuous form (Least-Squares Policy Iteration). The results show that in both cases ship trajectory can be found. However discrete Q-learning algorithm suffered from many limitations (mainly curse of dimensionality) and practically is not applicable to the examined task. On the other hand, LSPI gave promising results. To be fully operational, proposed solution should be extended by taking into account ship heading and velocity and coupling with advanced multi-variable controller.
    Źródło:
    Polish Maritime Research; 2012, S 1; 31-36
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie systemów nawigacji inercjalnej do pomiaru orientacji przestrzennej okrętu
    Using inertial navigational systems to measure the spatial orientation of a ship
    Autorzy:
    Szymak, P.
    Praczyk, T.
    Milewski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/250056.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Naukowo-Wydawniczy TTS
    Tematy:
    orientacja przestrzenna okrętu
    nawigacja inercyjna
    ruch okrętu
    spatial orientation of a ship
    inertial navigation system
    ship's motion
    Opis:
    Znajomość orientacji przestrzennej okrętu niezbędna jest do działania różnych systemów okrętowych np. systemów artyleryjskich. Do pomiaru orientacji przestrzennej można zastosować różne rozwiązania, jednym z nich, niezależnym od zewnętrznej infrastruktury są systemy nawigacji inercjalnej (INS - ang. Inertial Navigationa System). W artykule zaprezentowano system pomiarowy oparty o INS, jego użycie w warunkach rzeczywistych oraz wstępną analizę uzyskanych wyników.
    To operate, many ship systems, e.g. artillery systems, require information about spatial orientation of a ship. To measure the spatial orientation, different solutions can be used, and one of them is solution based on Inertial Navigational Systems (INS) whose the main advantage in military applications is their independency of external infrastructure. The paper presents a measurement system based on INS, its application in real conditions at sea and initial analysis of measurement results.
    Źródło:
    TTS Technika Transportu Szynowego; 2013, 10; 453-461, CD
    1232-3829
    2543-5728
    Pojawia się w:
    TTS Technika Transportu Szynowego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CFD Based Hull Hydrodynamic Forces for Simulation of Ship Manoeuvres
    Autorzy:
    Tabaczek, T.
    Gornicz, T.
    Kulczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/117623.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Manoeuvring
    Simulation of Ship Manoeuvres
    Equations of Ship's Movement
    Hydrodynamic Forces
    CFD Computations
    Hydrodynamic Characteristics
    Ship's Motion
    mathematical model
    Opis:
    There have been developed numerous mathematical models describing the motion of a ship. In opinion of present authors the CFD is mature enough to determine with confidence the hydrodynamic characteristics necessary to simulate ship manoeuvres. In this paper the authors present the attempt to determine the hull hydrodynamic forces using the results of CFD computations of ship flow. Results show qualitative agreement with reference data and reveal shortcomings due to simplifying assumptions applied in CFD computations.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 1; 31-35
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of the propeller emergence on the torque during sailing of a ship on a regular wave
    Autorzy:
    Szelangiewicz, T.
    Żelazny, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/359675.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    ship motion on a regular wave
    vertical relative motion
    propeller emergence
    decrease in torque value of a propeller
    Opis:
    While the ship is sailing on waves the relative motions occur which result in propeller emergence, and as a consequence – propeller thrust reduction which results in a decrease in the ship’s speed. Propeller emergence is also accompanied by the decrease in torque values, with which the propeller affects the propelling engine. The article presents both calculation results and the algorithm for calculating the decrease in torque of the propeller during ship motion on a regular wave.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 35 (107); 138-143
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of power demand for ship motion control system of sea mining ship fitted with tubular winning system
    Autorzy:
    Bortnowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/260362.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    sea mining ship
    tubular winning system
    action of sea environment
    thrust of ship propellers
    power of ship motion control system
    Opis:
    One of the crucial systems of sea mining ship for poly-metallic concretions is its motion control system (SMC). Power of such system depends on sea environment characteristics and main dimensions of the ship. It can be expected that it will have important influence on total power of the ship’s power plant and in effect on the mining ship’s dimensions. In this paper is presented one of the possible ways of preliminary estimation of design power of SMC system for sea mining ship. Since details of design solution of such system for the ship in question are unknown (ships of the kind have not been built so far) the presented results should be considered to be the first estimation of the order of the power demand.
    Źródło:
    Polish Maritime Research; 2007, 4; 24-30
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Concept of FTS model of ship motion based on expert shiphandling knowledge
    Autorzy:
    Zalewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/320627.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    system ekspercki
    ruch statków
    kontroler o rozmytej logice
    expert system
    ship motion
    fuzzy logic controller
    Opis:
    The paper presents a concept of FTS model of ship motion reflecting navigator's decision process while entering a Świnoujscie harbour on specific ship type at given hydrometeorological conditions. The conceptual model has been based on the fuzzy logic controller with expert database formed by manoeuvres obtained from the real-time non-autonomous trials classified in relation to expert manoeuvre impact on ship's advance, lateral and rotation speed and her position in reference to the present ship status.
    Źródło:
    Annual of Navigation; 2009, 15; 117-124
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical estimation of hull hydrodynamic derivatives in ship maneuvering prediction
    Autorzy:
    Kołodziej, Radosław
    Hoffmann, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/1551776.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    captive model tests
    CFD tools in maneuvering prediction
    MOERI Container ship (KCS)
    Hull hydrodynamic derivatives
    Mathematical model of ship motion
    Opis:
    Prediction of the maneuvering characteristics of a ship at the design stage can be done by means of model tests, computational simulations or a combination of both. Th e model tests can be realized as a direct simulation of the standard maneuvers with the free running model, which gives the most accurate results but is also the least aff ordable, as it requires a very large tank or natural lake, as well as the complex equipment of the model. Alternatively, a captive model test can be used to identify the hydrodynamic characteristics of the hull, which can be used to simulate the standard maneuvers with the use of dedicated soft ware. Two types of captive model tests are distinguished: circular motion tests (CMT) and planar motion mechanism tests (PMM). Th e paper presents an attempt to develop a computational method for ship maneuverability prediction in which the hydrodynamic characteristics of the hull are identifi ed by means of computational fl uid dynamics (CFD). Th e CFD analyses presented here directly simulate the circular motion test. Th e resulting hull characteristics are verifi ed against the available literature data, and the results of the simulations are verifi ed against the results of free running model tests. Reasonable agreement shows the large potential of the proposed method.
    Źródło:
    Polish Maritime Research; 2021, 2; 46-53
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modele z filtrem Kalmana i rozmyte w systemach dynamicznego pozycjonowania
    Kalman filter and fuzzy models in dynamic positioning systems
    Autorzy:
    Zalewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/350644.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    dynamiczne pozycjonowanie
    modelowanie ruchu statku
    filtr Kalmana
    logika rozmyta
    dynamic positioning
    ship motion modeling
    Kalman filter
    fuzzy logic
    Opis:
    Dynamiczne pozycjonowanie statku to proces obejmujący dwa problemy: 1) utrzymania stałych, zadanych parametrów pozycji i kursu oraz 2) podążania po wyznaczonej trajektorii ruchu. Do tego celu wykorzystuje się różnorodne urządzenia napędowo-sterowe (pędniki okrętowe i stery). W artykule przedstawiono różne metody numeryczne rozwiązania obu problemów sterowania jednostkami oceanotechnicznymi korzystając z technik filtracji i logiki rozmytej.
    Dynamic positioning of a ship is a process comprising two problems: 1) forcing the output of the ship to maintain a constant reference position and heading and 2) path following. In both cases the control is achieved using combination of several thrusters and rudders. The article presents various solutions to these control problems of offshore vessels, utilizing numerical filtration and fuzzy methods.
    Źródło:
    Górnictwo i Geoinżynieria; 2011, 35, 4/1; 411-426
    1732-6702
    Pojawia się w:
    Górnictwo i Geoinżynieria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of hydro-meteorological factors on the risk of harbour operations
    Autorzy:
    Abramowicz-Gerigk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/258690.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    harbour operations
    hydro-meteorological elements
    model tests of self-berthing
    real scale experiments
    safety of navigation
    ship motion simulation
    Opis:
    The paper presents a study on the environmental impact on the risk of harbour operations. The hydro-meteorological elements have been recognised as the most important safety factors with regard to the ship entrance into the harbour and berthing inside the docks. They are identified as real time, short and long term factors and they all should be considered in the safety assessment of harbour operations. The risk of each operation should be determined on the basis of weather forecast and the modelled prediction of the total water level, surface currents and waves. Several topics have been discussed in the paper with regard to the safe ship approach and navigation inside the harbour. The application of different tools for the prediction of ship performance is presented. The stochastic method for the determination of probability that the ship will navigate within the boundaries of the required navigational width and low speed manoeuvring standards proposed by Panel H-10 SNAME have been considered. The real scale experiments carried out in Port of Gdynia and the several trials performed using the Full Mission Simulator convinced that the open water model tests are necessary for the proper prediction of ship performance during berthing. The program of the proposed open water investigations is presented in the paper. The experimental stand constructed for the tests of ship-berth interactions, in the lake Silm at the Ilawa Ship Handling Training and Research Centre facilities is described.
    Źródło:
    Polish Maritime Research; 2007, S 2; 33-37
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of a critical area for a give-way ship in a collision encounter
    Autorzy:
    Krata, P.
    Montewka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/223997.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    maritime traffic safety
    collision risk
    anticollision
    ship's motion model
    ship domain
    bezpieczeństwo ruchu morskiego
    ryzyko kolizji
    zapobieganie kolizji
    ruch statku
    model ruchu statku
    Opis:
    Evasive action in ship-ship encounter has to be carried out on time and in line with the international convention on collision regulation – COLREG. The convention not only includes a set of rules defining types of relations between encountering ships but also indicates appropriate action to be taken in a given encounter. One of such encounters is crossing, where, in case of a collision situation, a give-way ship has to take an appropriate action in due time. However, a stand-on vessel is also given an opportunity to manoeuver, if it is made clear to her that the other ship is not fulfilling her obligations. However, it is difficult to specify, at which point in time in the course of an encounter, the stand-on ship has to take an action in order to avoid collision. It is understandable, as this parameter depends on numerous factors, both endogenous (e.g. ship characteristics, her maneuverability), and exogenous (e.g. type of encounter, weather conditions). Therefore in this paper we make an attempt towards the definition of the critical area for a maneuver of a stand-on ship, in the situation where the give-way vessel does not take an action. This is determined with the use of a hydrodynamic model of ship motion, and series of simulations conducted for several types of encountering ships under various conditions. Once determined, the critical area demarcates the no-go area around the own ship, where any other ships on collision courses must not enter. Otherwise a collision cannot be avoided by an action of one ship alone.
    Źródło:
    Archives of Transport; 2015, 34, 2; 51-60
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Waypoint path controller for ships
    Autorzy:
    Tomera, M.
    Alfuth, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/117436.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    control system
    waypoint
    waypoint path controller
    silm lake
    ship handling research and training centre at Ilawa
    Polska
    blue lady
    control algorithm
    ship motion control
    Opis:
    The paper presents and discusses tests of a waypoint controller used to sail a ship along the desired route. The planned desired route for the moving ship is given as a set of waypoints connected with straight lines. The ship's control is based on the rudder blade deflection angle as a commanded parameter. The task of the controller is to determine the rudder angle which will allow the ship to sail along the desired route segment. The controller algorithm consists of two parts, the first of which is used for controlling the ship motion along linear segments of the desired route, while the second part is used when changing to the next route segment. A switching mechanism is designed to choose the relevant part of the control algorithm. The quality of operation of the ship motion control algorithm was tested on the training ship Blue Lady, at the Ship Handling Research and Training Centre located on the lake Silm at Kamionka near Iława, Poland.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 2; 375-383
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of ship rolling motion on take-off aerodynamic characteristics of aircraft
    Autorzy:
    He, Z.
    Sun, X.
    Gu, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/259257.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship rolling motion
    ski-jump take-off
    Meshless method
    WALE turbulence model
    aerodynamic characteristics
    Opis:
    Ship motion is an important factor affecting on the safety of ski-jump take-off. The simplified frigate ship SFS1 was numerically simulated, and the results were compared with the experimental data, the feasibility of the calculation method was verified; Meshless method and WALE turbulence model were used to simulate the process of aircraft skijump take-off, aerodynamic characteristics under different rolling conditions during the aircraft ski-jump take-off process were presented. The results showed that: the influence of ship rolling motion on lift coefficient, drag coefficient and pitching moment was small, side force and rolling moment were greatly affected by rolling motion; the region of downwash with the maximum speed was about 10 m from the bow; the safety of ski-jump take-off was greatly affected when aircraft was close to the bow within 20 m.
    Źródło:
    Polish Maritime Research; 2018, S 2; 23-29
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelowanie CFD osiadania statków kontenerowych podczas manewru wymijania na torze wodnym
    CFD modeling of container vessel squat during passing by another ship at shallow waterway
    Autorzy:
    Jachowski, J.
    Krata, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/309590.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    trajektorie statków
    optymalne trajektorie statków
    hydromechanika
    ruch statków
    tor wodny
    nawigacja morska
    unikanie kolizji statków
    symulacja numeryczna
    modelowanie CFD
    ship trajectory
    optimal ship trajectories
    ship hydromechanics
    ship motion
    numerical simulations
    waterways
    marine nawigation
    ship collision avoidance
    CFD modeling
    Opis:
    W artykule omówiono badania nad zastosowaniem zaawansowanych obliczeń numerycznej mechaniki płynów do wyznaczania trajektorii ruchu (w sześciu stopniach swobody) statku morskiego żeglującego na akwenie ograniczonym podczas manewru wymijania z innym statkiem. Uwzględniono jednocześnie zarówno oddziaływanie dna i brzegów kanału o zadanej geometrii jak również oddziaływanie wymijanego statku, co jest podejściem nowatorskim na skalę światową. Wyniki symulacji przeanalizowano pod wzglądem hydrodynamicznego zjawiska osiadania, powstającego podczas przejścia statku przez akwen ograniczony głębokością i brzegami kanału przy jednoczesnej interakcji z wymijanym statkiem. W obliczeniach wykorzystano geometrię typowego statku kontenerowego.
    Paper describes a research into ship’s squat phenomenon which is related to the safe entering of large ships into contemporary existing sea harbors. As the significant research effort in ship hydromechanics is devoted in recent years to the practical navigation problems, the Authors follow this trend and addressed the squat by means of CFD numerical simulations. The analysis of 6 DOF ship motion was performed, including the effects of shallow water, horizontal restrictions, extend of a channel and especially ship squat during passing by maneuver at a waterway. An exemplary case-study is carried out for a large container vessel. The obtained results were experimentally verified by comparison to one German experiment and own models tests. Such complex approach is a novelty worldwide.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 4; 64-71
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction control systems in marine applications
    Autorzy:
    Gierusz, W.
    Miller, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/117282.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    control system
    marine applications
    ship motion
    automatic system
    Model Predictive Control (MPC)
    multiple input
    Multiple Output (MIMO)
    Model Predictive Heuristic Control (MPHC)
    Generalized Predictive Control (GPC)
    Opis:
    The paper presents one of the modern control methods used for steering of the ship motion. The different automatic systems used to navigate the vessels are described at the beginning. Next, prediction control methodology is presented and multidimensional MPC regulator applied to steering of the training ship is shown as a technical product. Tests results from the real-time experiments with the mentioned controller are presented at the end of the article.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 2; 361-366
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ruch cieczy w zbiorniku poziomym
    Motion of liquid at tank at horizontal motion
    Autorzy:
    Trębacki, K.
    Królicka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/317332.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    zbiornik prostopadłościenny
    ładunek płynny
    ruch ładunku
    ruch poziomy
    ruchy cieczy w zbiorniku
    ciśnienia na ścianach zbiornika
    obliczenia matematyczne działania zbiornika
    teoria liniowa
    teoria nieliniowa
    funkcja potencjału
    rectangular tank
    liquid cargo
    movement of liquid cargo
    horizontal motion
    ship's motion
    ship rolling
    movement of liquid in vessel
    pressure on walls of tank
    linear theory
    nonlinear theory
    potential function
    Opis:
    W artykule omówiony został ruch poziomy zbiornika wypełnionego cieczą. Wymieniono przyczyny ruchu cieczy w zbiorniku. Dokonano analizy wg teorii liniowej i nieliniowej. Wyznaczono częstości drgań własnych. Na podstawie teorii liniowej i nieliniowej wyznaczono funkcję potencjału prędkości Φ i powierzchni swobodnej η. Podano rozkłady ciśnień hydrodynamicznych na ściankach zbiornika.
    The article discussed a horizontal motion of tank filled with liquid. Discussed a causes of motion of liquid in the tank. Were made analysis by the theory of linear and nonlinear. In article the given of frequency of vibration. On the basis of theory of linear and nonlinear function are determined velocity potential and free surface. Given of distributions of hydrodynamic pressure on the walls of tank.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 10; 97-102
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ship seakeeping in UKC determination – a further study on wave force transfer functions
    Autorzy:
    Artyszuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/359064.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    ship seakeeping
    ocean wave
    shallow water
    motion dynamics
    Opis:
    Modeling of ship motions in waves concentrates in most applications on the response amplitude operator (RAO). This mathematically not demanding method of analysis is very attractive, but loses some essential information in certain situations. The objective of present contribution is to establish and investigate preliminary foundations for a seakeeping model as optimal for under keel clearance (UKC) estimation. A special attention was devoted to transients of motions, stationary harmonic motions, coupling between degrees of freedom, and the wave force transfer functions – all in the aspect of shallow water environment.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 2; 5-15
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability of motion of the crewed autonomous underwater vehicle
    Autorzy:
    Świtek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/244411.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    fluid mechanics
    ship hydrodynamics
    stability of motion
    underwater vehicle
    Opis:
    In this article I investigate the issues related to the motion stability of a crewed autonomous underwater vehicle of the 'wet' type. In vehicles of this kind, the necessity to perform decompression imposes certain requirements relating to the parameters of the motion. In particular it requires maintaining a constant depth regardless of the operating conditions. For this reason, the investigation is limited to an analysis of a two-dimensional motion within the vertical plane. The analysis of motion stability is based on the classic motion equations. In formulating the relations of forces, along with the hydrostatic influences, viscosity and inertia of the water environment are considered. Forces relating to the viscosity are examined through the resistance coefficients. The specific calculations draw from the results of model tests. Forces related to the inertia of the environment are accounted for considered through the water added-mass coefficients. In order to assess the quality of motion, a coefficient of damping and a degree of stability are used as values indicating the character of the results of the dynamic motion equations. The results of the example calculations are presented in the form of diagrams, complete with the lines representing the constant values of the above indicators of the motion stability for different structural solutions under various conditions in which the vehicle is operated.
    Źródło:
    Journal of KONES; 2011, 18, 1; 159-666
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ruch cieczy w zbiorniku w ruchu obrotowym
    Motion of liquid at tank in the rotation motion
    Autorzy:
    Trębacki, K.
    Królicka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/315693.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    zbiornik prostopadłościenny
    ładunek płynny
    ruch ładunku płynnego
    ruch statku
    kołysanie
    ruchy cieczy w zbiorniku
    ciśnienia na ścianach zbiornika
    obliczenia matematyczne działania zbiornika
    ściana zbiornika
    teoria liniowa
    teoria nieliniowa
    rectangular tank
    liquid cargo
    movement of liquid cargo
    ship's motion
    ship rolling
    movement of liquid in vessel
    pressure on walls of tank
    tank wall
    linear theory
    nonlinear theory
    Opis:
    W artykule omówiony został ruch ładunku płynnego w zbiorniku podczas obrotu. Przeprowadzono analizę teoretyczną wg teorii liniowej i nieliniowej. Wyznaczono potencjał prędkości cieczy i na tej podstawie funkcję ciśnienia w dowolnym punkcie objętości cieczy w zbiorniku. Podano wykresy obciążeń ścianek zbiornika od cieczy wg obydwu teorii.
    The article discussed a motion of liquid cargo in tank during rotation. The conducted are of theoretical analysis according linear and non-linear theory. Was designated the potential of velocity of the liquid and on the basis of pressure function at any point liquid of volume in tank. Are given of load charts walls of tank of liquid according to both theories.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 10; 92-96
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinematic decomposition of a ship nondimensional trajectory in turning circle test
    Analiza kinematyczna bezwymiarowej trajektorii statku podczas próby cyrkulacji
    Autorzy:
    Artyszuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/359722.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    manewrowanie statku
    cyrkulacja
    trajektoria
    kąt dryfu
    prędkość kątowa (bezwymiarowa)
    kinematyka ruchu
    ruch krzywoliniowy
    ship manoeuvring
    ship turning
    trajectory
    drift angle
    yaw velocity (nondimensional)
    motion kinematics
    curvilinear motion
    Opis:
    The paper presents basic principles of a ship’s nondimensional trajectory definition (for arbitrary manoeuvres) by means of drift angle and nondimensional yaw velocity. This enables faster and better tuning of mathematical model of ship manoeuvring motions against the provided full scale sea maneouvring trials (usually in a form of position trajectories) – since it is known the governing, basic factors behind the trajectory. A special focus has been applied to the standard turning circle test.
    W pracy dokonano nowatorskiego i kompleksowego ujęcia kinematyki ruchu krzywoliniowego, szczególnie w odniesieniu do bezwymiarowej (mierzonej jednostkami długości statku) trajektorii statku podczas manewru cyrkulacji. Sformułowano analitycznie kształt trajektorii oraz jej ewoluty (położenia środków krzywizny). Ponadto przedstawiono praktyczne znaczenie i możliwości kształtowania trajektorii poprzez dobór parametrów zmian kąta dryfu i bezwymiarowej prędkości kątowej. Pozwala to zredukować problem kształtu trajektorii do dwóch parametrów o bardzo ważnej interpretacji hydrodynamicznej, co ma olbrzymie znaczenie w procesie identyfikacji i/lub walidacji matematycznego modelu manewrowania statku.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 30 (102); 5-11
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical models for simulation of layer hydrodynamics of a ship fluidized bed boiler
    Autorzy:
    Tryczak, J. R.
    Zeńczak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/135090.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    two-phase flows
    fluidized bed boilers
    mathematical modeling
    simulation
    ship
    swaying motion
    Opis:
    Fluidized bed boilers have been widely used for many years in energetics but their application in shipbuilding has been incidental. The hydrodynamics of a fluidized bed is a complicated issue. If the swaying of a ship on a sea wave is taken into account, this issue will be further complicated. The choice of an appropriate mathematical model is important from the viewpoint of building computer models for the simulation of a fluidized bed during disruptions that result from the ship swaying on sea waves. Fluidization is a two-phase flow process, which is described by many models such as the homogeneous-slip model or heterogeneous-slide model. The most popular models that show two-phase gas-solid or fluid-solid flow are the Euler-Euler and Euler-Lagrange models. The paper presents models that describe a ship’s fluidized bed.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 47 (119); 54-58
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie parametrów ruchu statków na podstawie obserwacji ARPA i AIS
    Ship movement parameters compare based on ARPA and AIS observation
    Autorzy:
    Stupak, T.
    Wąż, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/316106.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    wektor ruchu
    ruch statku
    Systemu Automatycznej Identyfikacji Statków
    AIS
    ARPA
    motion vector
    ship traffic
    Automatic Ship Identification System
    Opis:
    W artykule przedstawiono badania wektora ruchu prowadzone w laboratorium radarowym Akademii Morskiej w Gdyni, oraz podczas rejsów na statkach. Badano dokładność wyznaczenia położenia statku, kursu, prędkości i odległości najmniejszego zbliżenia wykorzystując radary statkowe oraz dane z Systemu Automatycznej Identyfikacji. Stwierdzono, że dokładność wyznaczania badanych parametrów jest większa niż narzucają wymagania Międzynarodowej Organizacji Morskiej.
    This article presents the movement vector research conducted in the radar laboratory of Gdynia Maritime University and during vessel cruises. The precision of designating the vessels' location, course, speed and CPA were researched using on-baord radars and AIS data. It is concluded that the precision of designating the researched parameters is greater than the International Maritime Organization requires.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 12; 438-441, CD
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of the influence of propeller emergence on its thrust reduction during ship navigation on waves
    Prognozowanie wpływu wynurzania się śruby napędowej na spadek naporu podczas pływania statku na fali
    Autorzy:
    Szelangiewicz, T.
    Żelazny, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/359277.pdf
    Data publikacji:
    2010
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    kołysania statku na fali
    pionowy ruch względny
    ship motions on waves
    vertical relative motion
    Opis:
    During ship's navigation on waves some relative motions occur resulting in propeller emergence, which in consequence reduces the propeller thrust. The article presents an algorithm for calculating the propeller thrust reduction as a result of ship motions on waves. The algorithm has preset parameters: significant wave height Hs, period T1 and geographical direction.
    Podczas pływania statku na fali powstają m.in. ruchy względne, które powodują wynurzanie się śruby napędowej, a w konsekwencji spadek naporu. W artykule przedstawiono algorytm obliczania spadku naporu śruby w wyniku kołysań statku na fali o zadanych parametrach: wysokość znacząca Hs, okres T1 i kierunek geograficzny.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2010, 21 (93); 83-87
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The propeller thrust and speed reduction as a result of the propeller emergence on a given ocean route
    Spadek naporu i prędkości statku w wyniku wynurzania się śruby napędowej na danej linii żeglugowej
    Autorzy:
    Szelangiewicz, T.
    Żelazny, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/360413.pdf
    Data publikacji:
    2010
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    kołysania statku na fali
    pionowy ruch względny
    ship motions on waves
    vertical relative motion
    Opis:
    During ship navigation on waves its relative motions occur which result in propeller emergence. This, in consequence, causes the propeller thrust drop. The article presents the results of calculations of the propeller thrust drop and ship service speed reduction on a preset ocean route where specific mean statistic weather parameters occur.
    Podczas pływania statku na fali powstają m.in. ruchy względne, które powodują wynurzanie się śruby napędowej, a w konsekwencji spadek naporu. W artykule przedstawiono algorytm obliczania spadku naporu śruby w wyniku kołysań statku na fali o zadanych parametrach: wysokość znacząca Hs, okres T1 i kierunek geograficzny
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2010, 22 (94); 63-66
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Construction and analysis of new mathematical models of the operation of ship propellers in different maneuvering modes
    Autorzy:
    Kryvyi, O.
    Miyusov, M. V.
    Kryvyi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201453.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    ship propellers
    curvilinear motion
    mathematical models
    hydrodynamic forces
    hydrodynamic moments
    wake fraction
    thrust-deduction factor
    drift angle
    Opis:
    The influence of the curvilinear movement of the ship on the operation of the propeller was studied. It is shown that even at small values of the drift angle and the angular velocity of the vessel, the transverse component of the force on the propeller and the moment are non-zero and cannot be neglected. The existing and proposed new effective mathematical models of the longitudinal and transverse components of force and moment caused by the operation of the ship's propeller are analyzed. Simple expressions for the coefficients of the propeller thrust and the moment on the propeller shaft, the wake fraction, the thrust-deduction factor, and the flow straightening factor on the propeller at any drift angles and angular velocity are obtained. Numerical analysis of the obtained dimensionless components of forces and moments caused by the operation of the propeller is carried out, and their adequacy is shown. It is shown how the specified parameters change for all possible values of the drift angle and angular velocity. For a few commercial vessels of various types, technical characteristics and calculated dynamic parameters are given for the construction of mathematical models of propeller operation during curvilinear movement of the vessel.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 1; 95--102
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of optimum hull form for passenger car ferry with regard to its sea-keeping qualities and additional resistance in waves
    Autorzy:
    Cepowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/258898.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    sea-keeping qualities
    roll-on/roll-off ferry ship
    rolling
    transverse accelerations
    vertical accelerations
    motion sickness index
    additional resistance in waves
    ship hull form
    ship design parameters
    artificial neural networks
    fuzzy logic
    Opis:
    This paper presents a method which makes it possible to determine optimum hull form of passenger car ferry with regard to selected sea-keeping qualities and additional resistance in waves. In the first phase of investigations a hull form characterized by the highest qualities was selected from the list of similar ships. Next, its optimum dimension ratios were determined. Design criteria were formulated by using a method based on deterministic scenarios, but objective functions of partial targets were determined in the form of artificial neural networks. To select the best design variants elements of fuzzy logic were used, that made it possible a.o. to show merits of the design by means of linguistic variables. Such approach made it possible to find the best hull form and its dimensions from the point of view of all considered criteria simultaneously.
    Źródło:
    Polish Maritime Research; 2008, 2; 3-11
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of ship size and propeller parameters on engine workload during ship motion on regular wave
    Autorzy:
    Żelazny, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/135633.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    ship motions on a regular wave
    vertical relative motion
    propeller emergence
    decrease in torque value of a propeller
    Opis:
    While the ship is sailing on waves the relative motions occur which result in propeller emergence, and as a consequence – propeller thrust reduction which results in a decrease in the ship’s speed. Propeller emergence is also accompanied by the decrease in torque values, with which the propeller affects the marine engine. The article presents a simplified method for calculating the decrease in torque of the propeller during ship motion on a regular wave together with the obtained results for various ship sizes and propellers.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 41 (113); 52-57
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Manoeuvring Simulation on the Bridge for Predicting Motion of Real Ships and as Training Tool in Ship Handling Simulators
    Autorzy:
    Benedict, K.
    Kirchhoff, M.
    Gluch, M.
    Fischer, S.
    Baldauf, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/116460.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Manoeuvring
    Manoeuvring Simulator
    Predicting Motion
    Real Ships
    Training Tool
    ship handling simulator
    Navigational Bridge
    Full Mission Bridge Simulator (FMBS)
    Opis:
    International sea transport has growing rapidly during the period of the last decade. Ships became larger and wider and its container capacity is still increasing to 12.000 TEU and even more. To navigate such vessels safely from port to port and specifically within the ports more and more enhanced computer-based systems are installed on the ships navigational bridges. Prediction tools are very helpful and already in use on ships for a long time. However, the simplification of existing predictions allows restricted use only and do not include the immediate response on changes of rudder and engine. Within this paper investigations into the feasibility and user acceptance of newly developed layout of navigation display will be introduced and selected results of simulation studies testing the influence on manoeuvre performance dependent on different kind of prediction functions will be discussed. Examples will be given for results from test trials in the full mission ship handling simulator of the Maritime Simulation Centre Warnemunde and a concept for the application of the developed .tools for purposes of collision avoidance is described.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 1; 25-30
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence analysis of changes of design parameters of passenger-car ferries on their selected sea-keeping qualities
    Autorzy:
    Cepowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/259447.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    passenger-car ferry
    design guidelines
    preliminary design stage
    sea-keeping qualities
    rolling
    sea-sickness (motion-sickness) index
    vertical accelerations
    ateral accelerations
    ship main dimensions
    Opis:
    The main scientific aim of this research was to elaborate design guidelines which could make it possible to improve sea-keeping qualities of passenger-car ferries. The searchedfor design guidelines were prepared in the form of regression functions as well as artificial neural networks on the basis of the results obtained from calculations with the use of numerical methods based on the theory of planar flow around a body. The guidelines make it possible to predict ship roll, sea-sickness index, lateral and vertical accelerations on the basis of quantities available in the preliminary stage of ship design.
    Źródło:
    Polish Maritime Research; 2010, 1; 25-32
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical study of hydrodynamic derivatives and course stability under ship-bank interaction
    Autorzy:
    Liu, H.
    Ma, N.
    Gu, X. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/116925.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    safety at sea
    ship-bank interaction
    Reynolds-Averaged Navier-Stokes (RANS)
    hydrodynamic derivatives
    hydrodynamics
    Planar Motion Mechanism (PMM)
    Circulating Water Channel (CWC)
    User Defined Functions (UDF)
    Opis:
    Since ship-bank interaction affects the manoeuvrability of a ship navigating close to a bank, the determination of hydrodynamic derivatives is of great importance to assess the ship manoeuvrability. To obtain the hydrodynamic derivatives of the KVLCC2 model ship with different water depths and ship-bank distances, the simulation of PMM tests are carried out using an unsteady Reynolds-Averaged Navier–Stokes (RANS) based solver. Hybrid dynamic mesh technique is proposed to realize the simulation of pure yaw tests in confined water. Studies on the grid convergence and time-step-size convergence are firstly performed. Hydrodynamic derivatives for the ship in different water depths and ship-bank distances are compared. The course stability is investigated based on time-domain simulations and eigenvalue analysis, and the results show that the ship-bank interaction and shallow water effect have a remarkable influence on the course stability.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 4; 747-753
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the modeling of car passenger ferryship design parameters with respect to selected sea-keeping qualities and additional resistance in waves
    Autorzy:
    Cepowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/258828.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    sea-keeping qualities
    roll-on/roll-off ferryship
    rolling
    motion sickness index
    lateral accelerations
    additional resistance in waves
    ship design parameters
    modeling
    artificial neural networks
    optimization
    Pareto method
    Opis:
    This paper presents the modeling of car passenger ferryship design parameters with respect to such design criteria as selected sea-keeping qualities and additional resistance in waves. In the first part of the investigations approximations of selected statistical parameters of design criteria of ferryship were elaborated with respect to ship design parameters. The approximation functions were obtained with the use of artificial neural networks. In the second part of the investigations design solutions were searched for by applying the singleand multi-criterial optimization methods. The multi-criterial optimization was performed by using Pareto method. Such approach made it possible to present solutions in such form as to allow decision makers (shipowner, designer) to select solutions the most favourable in each individual case.
    Źródło:
    Polish Maritime Research; 2009, 3; 3-10
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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