Temat: moment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The dynamic free surface effect for different locations of partly filled tanks on board ships
Dynamiczny efekt występowania swobodnych powierzchni cieczy w zależności od lokalizacji na statku zbiorników częściowo zapełnionych
Autorzy:: Krata, P.
Powiązania:: https://bibliotekanauki.pl/articles/256118.pdf
Data publikacji:: 2008
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: swobodna powierzchnia cieczy
stateczność dynamiczna statku
ocena stateczności
moment przechylający
sloshing
free surface effect
dynamic ship's stability
stability assessment
heeling moment
Opis:: The results of experimental research and numerical simulation of sloshing phenomenon are presented. The heeling moment due to the dynamic movement of the fluid in a partly filled ship's tank is computed. The dependence of heeling moment effects upon the locations of the tank in the hull is described.
W artykule przedstawiono wyniki badań eksperymentalnych i symulacji numerycznych w zakresie przebiegu momentu przechylającego statek wskutek ruchu cieczy w niepełnych zbiornikach. Uwagę zwrócono na wpływ położenia niepełnego zbiornika względem osi kołysań bocznych statku.
Źródło:: Problemy Eksploatacji; 2008, 1; 171-179
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of dynamic heeling moment due to liquid sloshing in partly filled ships tanks for realistic range of rolling periods - a case study
Autorzy:: Jachowski, J.
Krata, P.
Wawrzyński, W.
Więckiewicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/246541.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: liquid sloshing
free surface effect
dynamic heeling moment
partly filled ship's tank
Opis:: Liquid sloshing phenomenon is a result of partly filled tank motions. As a tank moves, it supplies energy to induce and sustain a fluid motion. Both the liquid motion and its effects are called sloshing. The interaction between ship’s tank structure and water sloshing inside the tank consists in the constant transmission of energy. As the ship rolls, the walls of a partly filled tank induce the movement of water. Liquid sloshing phenomenon occurring in partly filled ships tanks directly affects the stability of the 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 and assessment. Since previous researches reveal the necessity of dynamic approach towards liquid movement onboard ships, the investigation is focused on problems related to time dependent wave-type phenomena. This aspect is omitted in the course of standard ship stability calculations. The set of numerical simulations of liquid sloshing taking place in moving tanks is carried out. Among many obtained characteristics, the heeling moment due to sloshing is emphasized and thoroughly investigated. The realistic range of possible metacentric heights and rolling periods is examined. The influence of ship’s rolling period on the heeling moment due to liquid sloshing is analyzed for one exemplary seagoing vessel as a case study. However, the conclusions can be generalized to some degree and comprise many other ships.
Źródło:: Journal of KONES; 2012, 19, 3; 177-184
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: An investigation into the influence of tank filling level on liquid sloshing effects onboard ships – static and dynamic approach
Autorzy:: Krata, P.
Wawrzyński, W.
Jachowski, J.
Więckiewicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/246561.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: liquid sloshing
free surface effect
dynamic heeling moment
partly filled ship's tank
Opis:: The commonly discussed main features of maritime transport are usually its safety and effectiveness. One of the most critical features of seagoing ships related to her safety is stability influencing ship's overall sea keeping performance. Vessels' stability calculation and evaluation, made on-board nowadays, is based on the stability criteria published by the ship’s classification societies. According to the IMO recommendations, the righting lever curve should be corrected for the effect of free surfaces of liquids in tanks. IMO-recommended methods of free surface correction calculation consider the static attitude towards the liquid sloshing phenomenon only. They also do not consider the location of the tank within the hull of the ship and the location of a rolling axis. The more precise and more realistic approach towards liquid movement is complex analysis of liquid sloshing phenomenon. As liquid sloshing taking part in partly filled ship's tanks is an important element affecting safety of maritime transportation process, there is a need for detailed analyses related to crucial parameters of the considered phenomenon. The paper is focused on an influence of tank's filling level on effects of aroused and sustained movement of ballast water, fuel and other liquids carried onboard ships. Both static and dynamic approaches towards the problem are utilized. The analytical methods for liquid weight transfer calculation and numerical simulations of the liquid sloshing phenomenon are applied. The simulations of liquid sloshing are based on Reynolds-averaged Navier-Stockes equation and they take into account the viscosity of liquid. The resultant heeling moment is decomposed into components enabling extraction of dynamical component differentiating the applied method from old static ones. The results of the study contribute to more precise ship safety evaluation.
Źródło:: Journal of KONES; 2012, 19, 3; 239-248
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The Impact of Sloshing Liquids on Ship Stability for Various Dimensions of Partly Filled Tanks
Autorzy:: Krata, P.
Powiązania:: https://bibliotekanauki.pl/articles/117482.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Ship Stability
Hydrodynamics
Partly Filled Tanks
Sloshing Liquids
Dynamic Heeling Moment
Liquid Sloshing
Dynamic Stability
computational fluid dynamics (CFD)
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. A number of numerical simulations of liquid sloshing taking place in a moving tank is carried out. The wide range of ship’s tanks 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; 2013, 7, 4; 481-489
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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

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Skocz do pozycji: 6.

Tytuł:: Model of Interaction of Water and Tank’s Structure in Sloshing Phenomenon
Autorzy:: Krata, P.
Powiązania:: https://bibliotekanauki.pl/articles/117117.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Safety and Security in Sea Transportation
Sloshing Phenomenon
Water Tank
Model of Interaction
Experimental Research
Numerical Simulation
Equations of Ship's Movement
Heeling Moment Calculations
Opis:: The paper presents the model of interaction between ship’s tank structure and water contained in the tank. The experimental investigation of sloshing loads in ships’ tank is characterized and the need for description of mutual influence is underlined. The model of interaction is made up for rectangular ship’s tanks and it is assumed to be in time-domain and nonlinear. The solution is based on the data obtained by the experimental research and numerical simulation. The study may be the contribution to more sophisticated estimation of ship’s stability than it takes place nowadays.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 4; 389-395
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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