Abstract
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) of a 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.
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Foundation item: This work was financially supported by the National Basic Research Program of China (973 Program, Grant No. 2014CB046205).
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Meng, L., Zhou, T., He, Yp. et al. Concept design and coupled dynamic response analysis on 6-MW spar-type floating offshore wind turbine. China Ocean Eng 31, 567–577 (2017). https://doi.org/10.1007/s13344-017-0065-7
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DOI: https://doi.org/10.1007/s13344-017-0065-7