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Wyświetlanie 1-15 z 16
Tytuł:
Design and application of an automated smart buoy in Increasing Navigation Safety and environmental standards in Ports
Autorzy:
Bojić, F.
Karin, I.
Juričević, I.
Čipčić, M.
Powiązania:
https://bibliotekanauki.pl/articles/1841522.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Safety at Sea
automated smart buoy
smart buoy
navigational safety
environmental standards
internet of things
Opis:
The growing demand for transportation has brought even larger quantities of traffic in spatially limited port areas. Considering a diverse traffic mix, infrastructural overcapacity and busy schedule, port communities have started to face possible degradation of safety and environmental standards. To mitigate these problems, a number of different monitoring solutions of marine environment were deployed. Since conventional environmental and traffic data gathering by physical monitoring and sampling was logistically complicated and inefficient in time and resources, different approaches had to be considered. With the rise of accessible Internet of Things (IoT) technology some ports already installed smart monitoring devices such as smart buoys. The goal of this paper is to examine the concept and benefits of an automated smart buoy as a cost effective, easy to install device capable of real-time remote information sharing. Furthermore, the design and operational processes of existing automated smart buoy will be presented, along with solutions for tackling navigational safety and environmental problems.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 2; 373-380
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of numerical forecast of atmospheric parameters near the Polish coast using the data from MIG-1 buoy
Autorzy:
Kałas, M.
Staśkiewicz, A.
Szefler, K.
Powiązania:
https://bibliotekanauki.pl/articles/1920639.pdf
Data publikacji:
2001
Wydawca:
Instytut Morski w Gdańsku
Tematy:
forecast
MIG-1 buoy
Opis:
The paper presents results of comparison of the numerical weather forecast data from two models (UMPL - ICM, Warsaw University and HIRLAM - SMHI Norrköping) with the measurements made in 2000 and 2001 at the open sea near the Hel Peninsula from the automatic buoy MIG-1. The agreement of both models with the experimental data is quite good.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2001, 28, 2; 109-118
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of numerical forecast of atmospheric parameters near the Polish coast using the data from MIG-1 buoy
Autorzy:
Kałas, M.
Staśkiewicz, A.
Szefler, K.
Powiązania:
https://bibliotekanauki.pl/articles/972866.pdf
Data publikacji:
2001
Wydawca:
Instytut Morski w Gdańsku
Tematy:
forecast
MIG-1 buoy
Opis:
The paper presents results of comparison of the numerical weather forecast data from two models (UMPL - ICM, Warsaw University and HIRLAM - SMHI Norrköping) with the measurements made in 2000 and 2001 at the open sea near the Hel Peninsula from the automatic buoy MIG-1. The agreement of both models with the experimental data is quite good.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2001, 28, 2; 109-118
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power performance of the combined monopile wind turbine and floating buoy with heave-type wave energy converter
Autorzy:
Homayoun, Esmaeil
Ghassemi, Hassan
Ghafari, Hamidreza
Powiązania:
https://bibliotekanauki.pl/articles/260485.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
combined renewable energy
monopile wind turbine
heaving buoy
power take of
Opis:
This study deals with a new concept of near-shore combined renewable energy system which integrates a monopile wind turbine and a floating buoy with heave-type wave energy converter( WEC). Wave energy is absorbed by power-take-off (PTO) systems. Four different shapes of buoy model are selected for this study. Power performance in regular waves is calculated by using boundary element method in ANSYS-AQWA software in both time and frequency domains. This software is based on three-dimensional radiation/diffraction theory and Morison’s equation using mixture of panels and Morison elements for determining hydrodynamic loads. For validation of the approach the numerical results of the main dynamic responses of WEC in regular wave are compared with the available experimental data. The effects of the heaving buoy geometry on the main dynamic responses such as added mass, damping coefficient, heave motion, PTO damping force and mean power of various model shapes of WEC in regular waves with different periods, are compared and discussed. Comparison of the results showed that using WECs with a curvature inward in the bottom would absorb more energy from sea waves.
Źródło:
Polish Maritime Research; 2019, 3; 107-114
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison between conventional buoy mooring CBM, single point mooring SPM and single anchor loading SAL systems considering the Hydro-meteorological condition limits for safe ship’s operation offshore
Autorzy:
Rutkowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/117407.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
offshore operations
Conventional Buoy Mooring (CBM)
Single Point Mooring (SPM)
Single Anchor Loading (SAL)
hydrometeorological condition limits
Multiple Buoy Mooring (MBM)
very large crude carrier (VLCC)
Floating Production Storage and Offloading (FPSO)
Opis:
The purpose and scope of this paper is to describe the characteristics and make comparisons between: Conventional Buoy Mooring (CBM), also referred to as Multi-Buoy Moorings (MBM), Single Point Mooring (SPM) and conventional Single Anchor Loading (SAL) systems considering the hydro meteorological condition limits enabling safe ship’s cargo and manoeuvring operation offshore. These systems (CBM, SPM and SAL) are typically used for short term mooring applications offshore associated with the offloading and loading of bulk liquid fuel tankers transporting refined and unrefined products of crude oil. The permanently moored vessels FSO/FPSO are excluded from this scope.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 1; 187-195
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DeepCwind semi-submersible floating offshore wind turbine platform with a nonlinear multi-segment catenary mooring line and intermediate buoy
Autorzy:
Motallebi, Mohammad
Ghassemi, Hassan
Shokouhian, Mehdi
Powiązania:
https://bibliotekanauki.pl/articles/24202503.pdf
Data publikacji:
2022
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
semi-submersible floating platform
offshore wind turbine
dynamic response
catenary mooring system
intermediate buoy
strain and tension
Opis:
In this paper, to improve the mechanical behavior of DeepCwind semi-submersible floating offshore wind turbine (FOWT) platform mooring lines, the nonlinear catenary cables of the platform were divided into multi-segment and intermediate buoys. Mathematical formulations of the boundary element method (BEM) governing the dynamics of mooring line systems with buoy devices were described. This study was applied to the OC4-DeepCwind semi-submersible FOWT platform, which is designed for a 200-meter water depth with mooring lines consisting of three catenary steel chain cables at 120° angles to each other. The dynamic response of the multi-segment catenary mooring lines with different buoy radiuses and different positions along the cables was investigated. The full-scale platform was modeled in ANSYS-AQWA software, and the simulations were performed under harsh offshore conditions. The mooring line’s general arrangement, tension, strain and uplift force for different buoy radiuses and their position along the cable are presented and discussed. Moreover, platform motions in three directions (surge, heave, and pitch) were also analyzed. It was concluded that by correctly selecting the buoy volume and position along the cable, the tension of the cable may be reduced by up to 45%. By incorrectly selecting the buoy, the results caused adverse effects.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 69 (141); 20--34
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Boja jako element gramatyki polskiego języka migowego: wstępny przegląd danych korpusowych
Buoy as an element of grammar of Polish Sign Language: a preliminary review of corpus data
Autorzy:
Szymańska-Gątarek, Weronika
Rutkowski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2147052.pdf
Data publikacji:
2022-03
Wydawca:
Towarzystwo Kultury Języka
Tematy:
buoy
grammar of PJM (Polish Sign Language)
simultaneous communication
three-dimensional signing space
Opis:
This paper is an introduction to the issue of buoys, i.e. signs normally produced with the non-dominant hand to ensure a spatial reference point for signs produced with the dominant hand. Simultaneous constructions of this type have been noticed in numerous sign languages, yet their equivalents have not been described in any detail for Polish Sign Language (PJM). The paper presents what can be said about the use of buoys in PJM on the basis of an analysis of a collection of empirical data extracted from the Corpus of Polish Sign Language (KPJM). The research confi rms that certain buoy types (fragment and depicting buoys) are frequent in PJM and can be found in recurring contexts, which speaks for considering them as a part of grammar of this language.
Źródło:
Poradnik Językowy; 2022, 792, 3; 59-70
0551-5343
Pojawia się w:
Poradnik Językowy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary Designing Method of External Pressure Vessels for Sea Subsurface Applications
Autorzy:
Michalski, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/259248.pdf
Data publikacji:
2010
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
subsurface buoy mooring systems
external pressure vessels
Opis:
This paper describes a unique engineering method intended for the preliminary designing of marine echo-location systems. The solved designing problem consists in determining geometrical parameters and selecting structural materials for a vessel of a buoyancy necessary to contain measuring instruments of a given mass, as well as its maximum gabarites and operational submersion depth. The assumed variability range of the system’s parameters determines a space of permissible applicability parameters of the method. Stress level related to permissible and critical stresses was assumed to be safety criterion for the vessel. The method may be applied also to solving converse problems consisting in determining maximum permissible submersion depth for a vessel made of assumed structural materials and having given geometrical parameters. The presented description of the method is illustrated by an example of its application.
Źródło:
Polish Maritime Research; 2010, 2; 3-9
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some practical problems of communications reliability inenviromental monitoring systems
Autorzy:
Dziadak, B.
Makowski, L.
Michalski, A.
Powiązania:
https://bibliotekanauki.pl/articles/220493.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
monitoring systems
GSM communication
floating buoy
real-time messaging
Opis:
In this paper, some issues of building a reliable, distributed measurement system for monitoring of water quality in reservoir Lake Dobczyckie are presented. The system is based on a measurement station that has the shape of a floating buoy which is supposed to be at anchor on the reservoir. Wireless data transmission problems that were encountered during the development of the buoy, modeling a radio link, and measurements of actual signal strength on the reservoir are discussed. A mathematical approach to procedures of early situation assessment was conducted, and specialized procedures were designed for measurement stations of the system. It is also discussed how such computations can improve a qualitative assessment of system performance in terms of real-time messaging.
Źródło:
Metrology and Measurement Systems; 2013, 20, 3; 337-350
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement and analysis of coastal waves along the north sea area of China
Autorzy:
Sun, S.
Li, H.
Sun, H.
Powiązania:
https://bibliotekanauki.pl/articles/259794.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
coastal wave
measurement
buoy
spectral analysis
Opis:
Taking advantage of coastal wave environment to carry out scaled ship model test is an effective testing technology for ship performance. In this paper, the method of spectral analysis is adopted to calculate the significant wave height, period, wave spectrum and some other parameters of some places along the North Sea area of China. The measured wave spectrum and the ocean spectrum are handled into non-dimensional form to evaluate their similarity. The influence of wind direction and tide on coastal waves was analyzed. And the results indicate that the coastal wave spectrum is similar to the ocean spectrum under some specific conditions.
Źródło:
Polish Maritime Research; 2016, 3; 72-78
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pozycjonowanie pław sygnalizacyjnych w zastosowaniach specjalnych
Positioning of signal buoys in special applications
Autorzy:
Makar, A.
Powiązania:
https://bibliotekanauki.pl/articles/315721.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
podwodna infrastruktura nawigacyjna
pławy sygnalizacyjne
pozycjonowanie
underwater navigation infrastructure
buoy lights
positioning
Opis:
W artykule przedstawiono problematykę wyznaczania położenia obiektów podwodnych stanowiących podwodną infrastrukturę nawigacyjną służącą do zabezpieczenia pozycjonowania obiektów poruszających się w toni wodnej oraz modułów rozpoznania podwodnego. Przyjęto założenie, że pozycjonowanie odbywa się na podstawie współrzędnych jednostki pływającej, a istotnym zagadnieniem jest wyznaczenie przesunięcia punktu odbicia fali akustycznej w wyniku występowania zjawiska refrakcji.
In the paper the issues of determination of localisation of underwater objects as the underwater navigational infrastructure for positioning of underwater moving objects and underwater detection modules have been presented. There have been assumed, that positioning is realized on the basis of the position of the vessel and the essential issue is to determine the displacement of the reflection point of the acoustic wave as a result of refraction phenomenon.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 1024-1028
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mooring area and mooring buoys plan
Autorzy:
Lušić, Z.
Pušić, D.
Powiązania:
https://bibliotekanauki.pl/articles/24201456.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
mooring area
mooring field
mooring buoy
anchorage
swing mooring
small vessels
swing radius
distance between mooring buoys
Opis:
Developing tourism and growing number of tourist and other smaller vessels and personal boats require a larger number of berths, outside dedicated ports, and harbours. Vessels can always anchor, but for ecological, and commercial reasons mooring areas with installed mooring buoys are better and more efficient solutions. However, choosing mooring areas, their size, number of buoys, etc. compared to choosing anchorage areas, is a much more complicated procedure, even more so for not having a unified form nor practice. This paper analyses some of the main issues in the selection of mooring sites and fields, focusing on the factors that should be considered in the planning process. As a result of the carried-out analysis some basic recommendations will be given concerning the choice of mooring field shape, swing radius calculation, distance from the shore, nearby vessels, and other obstacles.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 1; 147--155
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical study on the optimization of hydrodynamic performance of oscillating buoy wave energy converter
Autorzy:
Lai, Wenbin
Xie, Yonghe
Li, Detang
Powiązania:
https://bibliotekanauki.pl/articles/1573638.pdf
Data publikacji:
2021
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
wave energy converter
hydrodynamic performance
numerical simulation
physical experiment
Opis:
The oscillating buoy wave energy converter (OBWEC) captures wave energy through the undulating movement of the buoy in the waves. In the process of capturing wave energy, the hydrodynamic performance of the buoy plays an important role. This paper designed the “Haida No. 1” OBWEC, in which the buoy adopts a form of swinging motion. In order to further improve the hydrodynamic performance of the buoy, a 2D numerical wave tank (NWT) model is established using ADINA software based on the working principle of the device. According to the motion equation of the buoy in the waves, the influence of the buoy shape, arm length, tilt angle, buoy draft, buoy width, wave height and Power Take-off (PTO) damping on the hydrodynamic performance of the buoy is studied. Finally, a series of physical experiments are performed on the device in a laboratory pool. The experimental results verify the consistency of the numerical results. The research results indicate that the energy conversion efficiency of the device can be improved by optimizing the hydrodynamic performance of the buoy. However, the absorption efficiency of a single buoy for wave energy is limited, so it is very difficult to achieve full absorption of wave energy.
Źródło:
Polish Maritime Research; 2021, 1; 48-58
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An improvement in ro-ro stern berthing modelled on a case study
Autorzy:
Perkovic, M.
Batista, M.
Vidmar, P.
Luin, B.
Powiązania:
https://bibliotekanauki.pl/articles/135160.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
mooring analysis
buoy engineering
accident
ro-ro
windage
tramontana
simulation
Opis:
The high volume transported by ro-ro vessels has not come without a price. Accidents and incidents related to design – lack of bulkheads, instability, problems with cargo access doors, stowage, securing cargo and lifesaving appliances – are growing along with the size of the vessels themselves. One particular and recurrent problem is the degree of these giant box-like high riding vessels exposed to wind. Recently the effect of a tramontana – a fierce, sudden and short term regional wind – in the Port of Koper was to detach a moored ship, causing an accident. This paper will present a study of that accident, and through simulations and modelling determine an improvement that will allow berthing perpendicular to the stern ramp to function more securely.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 45 (117); 134-142
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Establishment of motion model for wave capture buoy and research on hydrodynamic performance of floating-type wave energy converter
Autorzy:
Gao, H.
Li, B.
Powiązania:
https://bibliotekanauki.pl/articles/259950.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
wave energy
linear wave
floating-type
hydrodynamic
absorption efficiency
Opis:
Floating-type wave energy converter has the advantages of high wave energy conversion efficiency, strong shock resistance ability in rough sea and stable output power. So it is regarded as a promising energy utilization facility. The research on hydrodynamic performance of wave capture buoys is the precondition and key to the wave energy device design and optimization. A simplified motion model of the buoys in the waves is established. Based on linear wave theory, the equations of motion of buoys are derived according to Newton’s second law. The factors of wave and buoys structural parameters on wave energy absorption efficiency are discussed in the China’s Bohai Sea with short wave period and small wave height. The results show that the main factor which affects the dynamic responses of wave capture buoys is the proximity of the natural frequency of buoys to the wave period. And the incoming wave power takes a backseat role to it at constant wave height. The buoys structural parameters such as length, radius and immersed depth, influence the wave energy absorption efficiency, which play significant factors in device design. The effectiveness of this model is validated by the sea tests with small-sized wave energy devices. The establishment methods of motion model and analysis results are expected to be helpful for designing and manufacturing of floating-type wave energy converter.
Źródło:
Polish Maritime Research; 2015, S 1; 106-111
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 16

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