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Effects of incident wind/wave directions on dynamic response of a spar-type floating offshore wind turbine system

Acta Mechanica Sinica 2019年第5期35卷 954-963页

作者： Guoqin Lyu Huiqin Zhang Jiachun Li Key Laboratory for Mechanics in Fluid Solid Coupling System Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

As a promising renewable energy,offshore wind energy currently is gaining more attention,by which the economic and efficient operation of floating wind turbine systems is a potential research *** study is primarily devoted to the analysis of dynamic response of the NREL-5 MW reference wind turbine supported by an OC3-Hywind spar-type platform using a recompiled code which combines FAST with *** verify the reliability of the recompiled code,the free decay motions of a floating wind turbine system in still water are examined with satisfactory *** that,thirteen scenarios with different angles between wind and wave from 0°to 90°are *** dynamic responses of the turbine system in various degrees of freedom(DOFs)for different incident wind/wave directions are presented in both time and frequency domains via the fast Fourier transform.

关键词： Offshore floating wind turbine Dynamic responses spar-type wind turbine Distributions of wind and wave directions

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Concept Design and Coupled Dynamic Response Analysis on 6-MW spar-type Floating Offshore Wind Turbine

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China Ocean Engineering 2017年第5期31卷 567-577页

作者： MENG Long ZHOU Tao HE Yan-ping ZHAO Yong-sheng LIU Ya-dong State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) School of Naval Architecture Ocean & Civil EngineeringShanghai Jiao Tong University

Tower, spar platform and mooring system are designed in the project based on a given 6-MW wind turbine. Under wind-induced only, wave-induced only and combined wind and wave induced loads, dynamic response is analyzed for a 6-MW spar-type floating offshore wind turbine （FOWT） under operating conditions and parked conditions respectively. Comparison with a platform-fixed system （land-based system） ofa 6-MW wind turbine is carried out as well. Results demonstrate that the maximal out-of-plane deflection of the blade of a spar-type system is 3.1% larger than that of a land-based system; the maximum response value of the nacelle acceleration is 215% larger for all the designed load cases being considered; the ultimate tower base fore-aft bending moment of the spar-type system is 92% larger than that of the land-based system in all of the Design Load Cases （DLCs） being considered; the fluctuations of the mooring tension is mainly wave-induced, and the safety factor of the mooring tension is adequate for the 6-MW FOWT. The results can provide relevant modifications to the initial design for the spar-type system, the detailed design and model basin test of the 6-MW spar-type system.

关键词： spar-type floating offshore wind turbine concept design combined wind and wave loads coupled dynamicresponse

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