Affiliation:
1. Saint-Venant Hydraulics Laboratory (Électricité de France, ENPC), Université Paris 3 , Chatou, France
2. OSPL - Ocean Space Planning Laboratory, Department of Systems Innovation, School of Engineering, The University of Tokyo 4 , Tokyo, Japan
Abstract
In this paper, the fluid–structure interaction of floating offshore wind turbine (FOWT) platforms under complex ocean conditions is investigated using OpenFOAM and in-house developed models. Two types of FOWT platform, i.e., a semi-submersible platform and a barge platform, are studied for their dynamic responses to either wave or current. The results reveal that a semi-submersible platform exhibits larger cross-flow motion and lock-in phenomenon, while a barge platform experiences smaller motion with no significant lock-in within the velocity range examined. The combined wave–current conditions are further studied for the semi-submersible platform, with different angles between wave and current, the current speeds, and wave parameters. Unlike other investigations focusing on colinear wave–current interaction, in which the waves usually mitigate vortex-induced motion (VIM); here, we find that waves might lead to an enhanced VIM with a large angle between current and wave. The evaluation on the interaction effect factor shows that the largest wave height in the lock-in region does not lead to the most dangerous scenario, herein, the largest platform motion. Instead, a smaller wave height with a large wave period can induce even larger motion.
Funder
Engineering and Physical Sciences Research Council
University of Edinburgh
University of Strathclyde
National Natural Science Foundation of China
Guangdong Basic and Applied Basic Research Foundation
Tsinghua Shenzhen International Graduate School via Scientific Research Start-up funds
China Scholarship Council
Subject
Condensed Matter Physics,Fluid Flow and Transfer Processes,Mechanics of Materials,Computational Mechanics,Mechanical Engineering
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