A 3D parallel boundary element method on unstructured triangular grids for fully nonlinear wave-body interactions

OCEAN ENGINEERING

卷:171

Article

Dombre, E.^1,4  Harris, J. C.¹  Benoit, M.³  Violeau, D.^1,2  Peyrard, C.^1,2 

[1] CEREMA, EDF R&D, Ecole Ponts, LHSV, Chatou, France

[2] Lab Natl Hydraul & Environm, EDF R&D, Chatou, France

[3] Aix Marseille Univ, CNRS, Cent Marseille, IRPHE,UMR 7342, Marseille, France

[4] Sogeti High Tech, 22-24 Rue Gouverneur Gen Eboue, Issy Les Moulineaux, France

关键词: Nonlinear wave-structure interaction;    Offshore structures;    Ocean engineering;    Boundary element method;   

DOI  :  10.1016/j.oceaneng.2018.09.044

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free