Aero-Hydrodynamic Coupled Dynamic Characteristics of Semi-Submersible Floating Offshore Wind Turbines Under Inflow Turbulence  

作　　者：JIANG Hai-rui BAI Xing-lan Murilo A.VAZ 

机构地区：[1]School of Naval Architecture and Maritime,Zhejiang Ocean University,Zhoushan 316022,China [2]Key Laboratory of Offshore Engineering Technology of Zhejiang Province,Zhoushan 316022,China [3]Ocean Engineering Program,Federal University of Rio de Janeiro,Rio de Janeiro,Brazil

出　　处：《China Ocean Engineering》2023年第4期660-672,共13页中国海洋工程（英文版）

基　　金：supported by the Natural Science Foundation of Zhejiang Province(Grant No.LHZ21E090003);the National Nature Science Foundation of China(Grant No.52171279);Zhoushan Science&Technology Project(Grant No.2021C21002);supported by CNPq(Conselho Nacional de Desenvolvimento Científico e Tecnológico,Grant No.301474/2017-6).

摘　　要：In this study,the frequency characteristics of the turbulent wind and the effects of wind-wave coupling on the low-and high-frequency responses of semi-submersible floating offshore wind turbines(FOWT)are investigated.Various wave load components,such as first-order wave loads,combined first-and second-order difference-frequency wave loads,combined first-and second-order sum-frequency wave loads,and first-and complete second-order wave loads are taken into consideration,while different turbulent environments are considered in aerodynamic loads.The com-parison is based on time histories and frequency spectra of platform motions and structural load responses and statistical values.The findings indicate that the second-order difference-frequency wave loads will significantly increase the natural frequency of low-frequency motion in the responses of the platform motion and structure load of the semi-submersible platform,which will cause structural fatigue damage.Under the action of turbulent wind,the influences of second-order wave loads on the platform motion and structural load response cannot be ignored,especially under extreme sea conditions.Therefore,in order to evaluate the dynamic responses of semi-submersible FOWT more accurately,the actual environment should be simulated more realistically.

关 键 词：turbulence characteristics floating offshore wind turbines second-order hydrodynamic loads low-and high-frequency responses aero-hydrodynamic coupling 

分 类 号：P752[天文地球—海洋科学] TM315[电气工程—电机]