文章基本信息

标题：Numerical simulation of the seakeeping of a military trimaran hull by a novel overset mesh method in regular and irregular waves
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作者：Parviz Ghadimi ; Saeid Karami ; Amin Nazemian 等
期刊名称：Scientific Journals of the Maritime University of Szczecin
印刷版ISSN：1733-8670
电子版ISSN：2392-0378
出版年度：2021
期号：65
页码：38-50
DOI：10.17402/459
语种：English
出版社：MUS
摘要：The hydrodynamic performance of trimaran hulls has been previously investigated for optimum performance in calm water, but there is still a limited understanding of its motion response; therefore, a CFD-based numerical approach was developed and applied on a trimaran hull in the presence of regular and irregular waves. To validate the CFD method, a comparison was conducted using both experimental and 3D panel method data. In this study, two diﬀerent turbulence models were surveyed, and the SST Menter k-Omega (k-ω) turbulence model was shown to be a more accurate model than the realizable k-Epsilon (k-ε) model. The diﬀerent features of the proposed numerical model include the implementation of an overset mesh method, unique mesh plan refnement, and wave-damping region. The discrepancy between the experimental data and the results of other seakeeping calculation methods have always been problematic, especially for low-speed strip theory and 3D panel methods, but good consistency was observed between the proposed CFD model and experimental data. Unlike potential-based or conformal mapping seakeeping analysis methods, the eﬀect of nonlinear waves, hull shape above the waterline, and other ship dynamic phenomena were considered in this CFD application. The proposed CFD method reduces the simulation time and computational eﬀorts for ship motion calculations.
关键词：trimaran;hydrodynamic performance;seakeeping;overset mesh;numerical simulation;regular and irregular waves