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Wyszukujesz frazę "green-water shipping" wg kryterium: Wszystkie pola


Wyświetlanie 1-2 z 2
Tytuł:
Approximation of the index for assessing ship sea-keeping performance on the basis of ship design parameters
Autorzy:
Cepowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/259570.pdf
Data publikacji:
2007
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
sea-keeping qualities
sea-keeping performance index
approximation
ship design parameters
artificial neural networks
rolling
slamming
green-water shipping
Opis:
This paper presents a new approach which makes it possible to take into account seakeeping qualities of ship in the preliminary stage of its design. The presented concept is based on representing ship’s behaviour in waves by means of the so called operational effectiveness index. Presented values of the index were calculated for a broad range of design parameters. On this basis were elaborated analytical functions which approximate the index depending on ship design parameters. Also, example approximations of the index calculated by using artificial neural networks, are attached. The presented approach may find application to ship preliminary design problems as well as in ship service stage to assess sea-keeping performance of a ship before its departure to sea.
Źródło:
Polish Maritime Research; 2007, 3; 21-26
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of marine risers subjected to shoal/deep water in the installation process
Autorzy:
Wang, Yikun
Luo, Songxiang
Yang, Mo
Qin, Tao
Zhao, Jing
Yu, Gang
Powiązania:
https://bibliotekanauki.pl/articles/32899597.pdf
Data publikacji:
2022
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
sail catamaran
green shipping
zero emission
hybrid propulsion
Opis:
The dynamics of the installation process of marine risers subjected to shoal/deep seawater is studied. The riser is assumed to be a cantilevered Euler‒Bernoulli beam. The upper end of the riser is clamped on the vessel or the drilling platform. The lower end of the riser is connected to the Blowout Preventer Stack (BOPs) and Lower Marine Risers Package (LMRP). The lateral fluid forces induced by the sea wave and sea current are introduced into the governing equations of motion. The lateral displacement and stress distributions of the riser are obtained by solving the governing equation of the riser via Galerkin’s discretisation scheme and a fourth-order Runge‒Kutta algorithm. The results indicate that the riser exhibits different behaviours under various depths because of the different distributions of the flow velocity ranging from the sea surface to the seabed. In the case of shoal water, the dynamics of the riser are dominated by the sea wave, while in the case of deep water it is affected mainly by the sea current velocity and sea surface wind velocity.
Źródło:
Polish Maritime Research; 2022, 2; 43-54
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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