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Tytuł:
A method for determining the usability potential of ship steam boilers
Autorzy:
Muślewski, Ł.
Pająk, M.
Landowski, B.
Żółtowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/259611.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship steam boilers
operation management
complex technical systems
usability potential
Opis:
Ship large-power steam boiler may serve as an example of complex critical technical system. A basis for rational control of operation of such system is knowledge on its capability of fulfilling the tasks to which it was intended. In order to make it possible to apply computer aiding to operational decision-making the capability should be described analytically. In this paper it was proposed to express the capability of ship steam boiler ( considered a complex system) to perform service tasks, by calculating components of its usability potential in a given instant t. To this end , was distinguished a set of steam boiler fundamental features which formulate space of its technical states. Values and characteristic intervals of the features were defined and this way sub-spaces of serviceability and non-serviceability states of the object in question were determined. Next, in the considered space, technical state of the boiler and its usability potential was determined. Owing to this it become possible to quantitatively express the steam boiler functioning capability which served as a basis for elaborating an algorithm for controlling the operational processes of a complex technical system under action. In this paper is also described a way of application of the presented method to calculation of ship steam boiler usability potential, which may be especially instrumental in the case of operational control of the boilers of the kind , equipped with interstage reheaters, i.e. those operating with high values of operational parameters.
Źródło:
Polish Maritime Research; 2016, 4; 105-111
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method for evaluating theoretical and real operation of diesel engines in energy conversion formulation taking into account their operating indices
Autorzy:
Girtler, J.
Powiązania:
https://bibliotekanauki.pl/articles/260600.pdf
Data publikacji:
2011
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
operation
energy
diesel engine
ship’s main engine
Opis:
The article proposes valuating the operation of an arbitrary diesel engine, based on the sample case of a ship’s main engine in which energy conversion processes take place in a given time. The above operation is understood as the energy transfer to the screw propeller in the given time in which the energy conversion into work and/or heat and its further transmission take place. The here proposed method for evaluating the operation of the main engines installed in marine power plants consists in comparing the operation of these engines to a physical quantity the measuring unit of which is the joule-second (joule×second). A new term is introduced which bears the name of the theoretical engine operation and is the standard (ideal) operation which can be compared to the operation of real engines revealing different levels of wear. It was shown that the calculations of the theoretical operation defined in the above way cannot make direct use of commonly known theoretical Diesel and Sabathe cycles. Instead they should use the cycles modified by heat abstraction taking place in accordance with the isobaric, or isothermal process. Other new terms introduced in the article are: the degree of excellence of energy conversion to work, considered as the measure of excellence of engine operation, and the degree of engine operation dissipation, being the measure of its real operation. It is shown that if in time t of engine operation the case takes place that: Li = idem and Le = idem, then the engine operation dissipation is equal to its mechanical efficiency.
Źródło:
Polish Maritime Research; 2011, 3; 31-36
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Method of Assessment of the Liquid Sloshing Impact on Ship Transverse Stability
Autorzy:
Krata, P.
Powiązania:
https://bibliotekanauki.pl/articles/117159.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ship operation
liquid sloshing phenomenon
liquid sloshing
computational fluid dynamics (CFD)
hydrodynamics
ship stability
ship transverse stability
dynamic heeling moment
Opis:
Liquid sloshing phenomenon taking place in partly filled ships’ tanks directly affects the stability of a vessel. However, only static calculations are carried out onboard ships nowadays and static transfer of liquid weight is taken into account in the course of routine stability calculation. The paper is focused on a dynamic heeling moment due to liquid sloshing in tanks onboard ships. The set of numerical simulations of liquid sloshing taking place in moving tanks is carried out. The realistic range of geometric parameters is taken into account. The conducted CFD simulations are experimentally verified. Finally, the method of an assessment of the liquid sloshing impact on ship transverse stability is worked out. The key point of the method is a dynamic coefficient describing relation of the researched dynamic heeling moment and the quasi-static one in terms of dynamic stability of a vessel which is related to the weather criterion of ship stability assessment.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8 no. 4; 535-541
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 Model of Ship Propulsion Systems Operating Process
Model procesu eksploatacji układu napędowego statku
Autorzy:
Girtler, J.
Powiązania:
https://bibliotekanauki.pl/articles/360243.pdf
Data publikacji:
2004
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
proces eksploatacji
proces semimarkowski
układ napędowy statku
EXPLO-SHIP 2004
operation process
semi-Markov process
ship propulsion system
Opis:
The paper contains a formal description of ship propulsion systems operation process. The model of the process is presented in the form of two-dimensional stochastic process of which coordinates are semi-Markov processes of the final states set. The former process describes the process of changes in technical states of ship propulsion systems, the latter - the process of changes in their operating states. A monovariate model of ship propulsion systems operation process has also been proposed.
Podano opis formalny procesu eksploatacji układów napędowych statków. Model tego procesu przedstawiono w formie dwuwymiarowego procesu, którego współrzędnymi są procesy semi-Markowa o skończonych zbiorach stanów. Jeden z tych procesów jest procesem zmian stanów technicznych układów napędowych a drugi - procesem zmian ich stanów eksploatacyjnych. Zaproponowano także jednowymiarowy model procesu eksploatacji układów napędowych statków.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 211-220
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simulation analysis of behaviour of ship-borne helicopter main rotor due to ship motion
Autorzy:
Stanisławski, J.
Powiązania:
https://bibliotekanauki.pl/articles/243038.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
helicopter
rotor blade
ship deck operation
Opis:
The paper presents a simulation method of analysis of the couplings between rotor blades motion and helicopter fuselage standing on ship deck at the phase of take-off or landing when whirling rotor generates thrust less than weight of the helicopter. The oscillating motion of the ship deck due to waves is considered. The physical model includes the helicopter fuselage treated as the stiff body supported by units of springs and dampers corresponding to landing gear characteristics. The rotor blades are modelled by elastic axes with distributed lumped masses of blade segments. The equations of fuselage and rotor blades motion are solved applying Runge-Kutta method. According to the Galerkin method, parameters of rotor blades motion are assumed as a resultant combination of considered blade torsion and bending eigen modes. Data of the light helicopter with three-bladed rotor are applied for the simulation of the rotorcraft behaviour aboard the ship. The calculations concerning helicopter standing on the fixed plane and on oscillating ship deck show influence of ship movement on fuselage motion and rotor blades deflections, flapping, and lead-lag motion. Moreover, simulations show influence of the side wind and control of the rotor swash-plate deflections. The additional unit of blade eigen modes and frequencies is applied to model the blade hitting to the flapping limiter, which can occur at the low rotation speed of the rotor. Temporary contact of the articulated blade with limiter changes its boundary conditions, which can rapidly increase the blade bending moments. The simulation method enables to determine conditions of safe operations of ship-borne helicopters without exceeding the limits and generating the excessive blade loads.
Źródło:
Journal of KONES; 2016, 23, 1; 313-320
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An approach to Baltic Port, Shipping, Ship Traffic and Operation Information Critical Infrastructure Network operation process
Autorzy:
Guze, S.
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2068963.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
shipping
ship traffic
port operation
information systems
operation process
parameters
Opis:
The goal of the article is to analysis of static and dynamic industry installations existing in the Baltic Sea Region performed to classify them as a network of networks. As the result of this analysis, the Baltic Port, Shipping, Ship Traffic and Port Operations Information Critical Infrastructure Network composed of three single critical infrastructure networks are distinguished. In the next step, the operation process for every installations and finally for network of networks are defined.
Źródło:
Journal of Polish Safety and Reliability Association; 2016, 7, 3; 21--30
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza elementów składowych wielokryterialnego wektora czynnika ludzkiego w aspekcie bezpiecznej eksploatacji statku i przetrwania na morzu
Analysis of component elements of the multi-terterial human factor in the aspect of safe ship operation and seasoning at sea
Autorzy:
Łosiewicz, Z.
Netczuk-Gwoździewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/315235.pdf
Data publikacji:
2018
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
czynnik ludzki
zachowania marynarzy
zagrożenie
akcja ratownicza SAR
bezpieczna eksploatacja statku
bezpieczeństwo żeglugi
human factor
behavior of seafarers
danger
rescue operations
SAR action
safe ship operation
safety of navigation
Opis:
W artykule omówiony został wielokryterialny wektor czynnika ludzkiego w aspekcie bezpiecznej eksploatacji statku i przetrwania na morzu. Dokonano próby oceny, które elementy czynnika ludzkiego mają największy wpływ na zachowanie marynarzy w sytuacji kryzysowej.
The article discusses the multi-criteria vector of the human factor in the aspect of safe ship operation and survival at sea. An attempt was made to assess which elements of the human factor have the greatest impact on the behavior of seafarers in a crisis situation.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2018, 19, 6; 152-156, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of 3-D Velocity Measurement of Vessel by VI-GPS for STS Lightering
Autorzy:
Yoo, Y.
Pedersen, E.
Tatsumi, K.
Kouguchi, N.
Arai, Y.
Powiązania:
https://bibliotekanauki.pl/articles/117175.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
Global Positioning System GPS
Vessel Velocity
STS Lightering
3D Velocity Measurement
Ship-to-Ship (STS) Operation
Liquefied Natural Gas (LNG)
Kinematic GPS (KGPS)
Opis:
A lightering operation is a type of Ship-To-Ship (STS) operation where two ships are together in open waters and transfer the cargo e.g. crude oil, LNG. High skills and experience are required by the human operators as no relevant equipment for determining the relative speeds and distances with sufficient accuracies has been implemented. The officer in charge of an STS lightering takes the decision on adequate maneuvering orders based on predominantly visual observations during the final approach. Landing on all fenders simultaneously is an objective in order to minimize ship-fender contact forces, but this is rather difficult to achieve in practice even in calm sea due to the effect of hydrodynamic interaction when the ships are closing in. Furthermore, currents that are present in the lightering zone add to the operational complexity. A field measurement experiment has been carried out with a Velocity Information GPS (VI-GPS) system installed onboard a ferry approaching port for berthing which is similar to an STS lightering. The paper proposes to apply VI-GPS as input sensor to a decision-support and guidance system aiming to provide accurate velocity information to the officer in charge of an STS operation. It is argued that DOP of VI-GPS is related to the velocity error.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 1; 43-48
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approach manoeuvre during emergency ship-to-ship transfer operation with oil spill
Autorzy:
Witkowska, A.
Śmierzchalski, R.
Wilczyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/116511.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
oil spill
environmental protection
ship-to-ship transfer operation
Ship to Ship (STS)
Ship to be Lightered (SBL)
approach manoeuvre
safety at sea
ships manoeuvering
Opis:
One of the major activities during Ship to Ship (STS) transfer operation at sea is to safe approach the Ship to be Lightered (SBL) which moves on a constant heading with slow speed or drifting. In the paper described the manoeuvring problem for approaching during emergency STS transfer operation with oil spill. The approach manoeuvre is considered as a sequence of navigation manoeuvres in specific navigational environment with environmental and operational constraints as well as ship dynamic performance. Additional constraints results from STS transfer operation guide and navigation practise.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 2; 331-337
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approximate Method of Calculating Forces on Rudder During Ship Sailing on a Shipping Route
Autorzy:
Żelazny, K.
Powiązania:
https://bibliotekanauki.pl/articles/116163.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Ship Operation
Rudder
Hydrodynamics
Plane Rudder
Ship Design
Forces on Plane Rudder
Hydrodynamic Forces
Forces Calculation
Opis:
Service speed of a ship in real weather conditions is a basic design parameter. Forecasting of this speed at preliminary design stage is made difficult by the lack of simple but at the same accurate models of forces acting upon a ship sailing on a preset shipping route. The article presents a model for calculating forces and moment on plane rudder, useful for forecasting of ship service speed at preliminary stages of ship design.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 459-464
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the concept of the new methodology for the evaluation of ship planned maintenance system
Autorzy:
Stanivuk, T.
Stazić, L.
Vidović, F.
Bratić, K.
Powiązania:
https://bibliotekanauki.pl/articles/2063953.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ship operation problems
maintenance system
Planned Maintenance System
assessment process
expert opinion
onboard maintenance
Opis:
The paper presents an attempt to develop better and cheaper methodology for evaluation of the quality of the ships’ computerized Planned Maintenance System databases. A concept for the better methodology has been developed following many times verified rule that faster and cheaper is better. The concept of the methodology has been checked in operation, tested on four different databases. Results of the evaluation performed by the concept are compared with an expert evaluation using old, verified methodology, performed on same databases. Comparison valuated the concept, bringing the verdict if it is functioning or not, showing that the old and verified rule is not functioning every time.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 3; 739--742
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conditions of safe ship operation in sea waterway systems
Autorzy:
Gucma, S.
Powiązania:
https://bibliotekanauki.pl/articles/359136.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
marine traffic engineering
sea waterway systems
traffic control
safe ship operation
algorithm
Opis:
The article presents an algorithm developed for determining conditions of safe ship operation in a system of sea waterways consisting of three components, or subsystems: waterways, navigation and traffic control. A model of the optimization of sea waterway system parameters is described.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 1; 55-58
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Considerations on limiting the elements of human factor influence on breakdowns of ships machinery illustrated by some case studies
Rozważania dotyczące ograniczenia wpływu elementów czynnika ludzkiego na awarie w siłowni okrętowej ilustrowane opisem pewnych charakterystycznych przypadków
Autorzy:
Listewnik, J.
Wiewióra, A.
Powiązania:
https://bibliotekanauki.pl/articles/258330.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
czynnik ludzki
znaczenie
bezpieczna eksploatacja
statek
globalizacja załóg
human element
importance
safe ship operation issues
globalisation of crew
Opis:
The paper in the first part introduces the reader into general issues contributing to the complex role of the human factor in safe ship operation. Futher the capacity that the International Maritime Organisation (IMO) attaches to the human element in shipping is discussed. Next, the International Safety Management (ISM) role towards safer ship operation and the economic viability of a shipowner is highlighted. The last part of the paper contains two case studies, the first illustrating the need for training expertise and certification for shipboard electrical officers and the second case giving an example how not observing simple procedures and checklists by the crew can lead to fatal and costly accident.
Artykuł w pierwszej części wprowadza czytelnika w ogólne problemy mające swój wkład w złożoną rolę czynnika ludzkiego w bezpiecznej eksploatacji statku. Rozpatrywany jest zakres roli, jaką Międzynarodowa Organizacja Morska (IMO) przywiązuje do elementu ludzkiego w żegludze. Następnie została przedyskutowana rola Międzynarodowego kodu bezpiecznego zarządzania (International Safety Management - ISM) z punktu widzenia bezpiecznej eksploatacji statku i ekonomicznej korzyści dla armatora. Ostatnia część artykułu zawiera opisy dwóch specyficznych awarii na statkach; pierwszy opis awarii "A" ilustruje konieczność szkolenia ekspertów i wydawania odpowiednich świadectw dla oficerów elektryków, drugi przypadek "B" stanowi przykład, jak nieprzestrzeganie przez załogę prostych procedur i list sprawdzających może prowadzić do fatalnych i kosztownych awarii.
Źródło:
Problemy Eksploatacji; 2007, 3; 147-157
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of nondimensional arguments in dimensional functions of ship propulsion engine operation
Autorzy:
Rosłanowski, J.
Charchalis, A.
Powiązania:
https://bibliotekanauki.pl/articles/246528.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ship propulsion engine operation dimensional analysis
dimensionless arguments in dimensional functions
Opis:
The following article describes different ways for determining dimensionless arguments in dimensional functions of ship propulsion engine operation. Dimensional space has also been characterized in relation to properties it possesses. An attention has been paid to the fact that it creates Abelian group, where involution fulfils multiplication axiom by scalar, and positive numbers that belong to dimensional space create dimensionless subspace. The conception of dimensional dependence has also been explained. There are also described conditions, which should be fulfilled by dimensional quantities to be dimensionally independent. Fundamental theorems of dimensional analysis have also been characterized. There is also given the definition of dimensional function of ship propulsion engine operation concerning values and dimensional arguments. It has been explained what requirements are to be fulfilled. One can also learn what limitations are imposed on dimensional function of ship propulsion engine operation concerning dimensional homogeneity and invariance. The ways of dimensional function transformation into a numerical one have been described. In addition, some conditions have been given which must be applied at given method of dimensional function transformation. An attention has been paid to the fact that dimensionless arguments are similarity invariant as a result of transformation by the similarity method of mathematical model of ship propulsion engine operation. In this study, the ship propulsion engine performance is expressed by product of Joule and second interpreted as transfer of energy in the form of work. Identification of ship propulsion engine operation by dimensional analysis performed in terms of its usefulness for diagnosis of ship propulsion engines. The basic problem of marine diesel exploitation is the monitoring of its technical condition. Diagnosis of marine diesel propulsion increases the safety of the ship and thus protects the marine environment against pollution.
Źródło:
Journal of KONES; 2015, 22, 2; 185-190
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the Cruise Vessels Seasonal Pattern in Eastern Adriatic
Autorzy:
Stanivuk, T.
Mišura, A.
Stazić, L.
Štolfa, I.
Powiązania:
https://bibliotekanauki.pl/articles/2063949.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ship operation problems
cruise vessels
Eastern Adriatic
Adriatic Sea
Cruise Ship Arrivals
seasonal pattern
ship size
duration of ship visit
Opis:
The notion of a seasonal pattern of cruise ships has been used frequently, but very few authors have analysed all the features of this pattern. This article adds some new insights on this topic by analysing cruise ship activity in the three largest ports on the east coast of Adriatic Sea in 2017 and 2018. The article presents an analysis of cruise ship arrivals at the ports and compares the analysis to the established pattern in the Mediterranean, revealing the nature of the seasonal pattern for the ports analysed. In addition, two further analyses were carried out, firstly the analysis of ship size, which determines new characteristics of the seasonal pattern. The second additional analysis considered the duration of ship visit during different times of the year and determined another pattern characteristic.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 3; 743--748
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
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