Journal
OCEAN ENGINEERING
Volume 171, Issue -, Pages 505-518Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2018.09.044
Keywords
Nonlinear wave-structure interaction; Offshore structures; Ocean engineering; Boundary element method
Funding
- French ANRT Agency (CIFRE) [2011-1724]
- Fondation des Ponts through the Barre de Saint-Venant research fund
- French ANR (Agence Nationale de la Recherche) [ANR11-MONU-018-01 MONACOREV]
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This paper presents the development and validation of a three-dimensional numerical wave tank devoted to studying wave-structure interaction problems. It is based on the fully nonlinear potential flow theory, here solved by a boundary element approach and using unstructured triangular meshes of the domain's boundaries. Time updating is based on a second-order explicit Taylor series expansion. The method is parallelized using the Message Passing Interface (MPI) in order to take advantage of multi-processor systems. For radiation problems, with cylindrical bodies moving in prescribed motion, the free-surface is updated with a fully Lagrangian scheme, and is able to reproduce reference results for nonlinear forces exerted on the moving body. For diffraction problems, semi-Lagrangian time-updating is used, and reproduces nonlinear effects for diffraction on monopiles. Finally, we study the nonlinear wave loads on a fixed semi-submersible structure, thereby illustrating the possibility to apply the proposed numerical model for the design of offshore structures and floaters.
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