Dynamic Response of 6MW Spar Type Floating Offshore Wind Turbine by Experiment and Numerical Analyses
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ponse of 6MW Spar Type Floating Offshore Wind Turbine by Experiment and Numerical Analyses MENG Longa, b, c, d, HE Yan-pinga, b, c, *, ZHAO Yong-shenga, b, c, *, YANG Jiea, b, c, YANG Hee, HAN Zhao-longa, c, YU Longa, b, c, MAO Wen-gangf, DU Wei-kangg a State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China b Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai Jiao Tong
University, Shanghai 200240, China c School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China d China Aerodynamics Research and Development Center, Mianyang, 621000, China e Ocean Engineering Department, Texas A&M University, College Station, TX 77843, USA f Department of mechanics and Maritime Sciences, Chalmers University of Technology, 41296, Gothenburg, Sweden g Ocean Engineering Group, Department of Civil, Architecture and Environmental Engineering, University of Texas
at Austin, Texas, TX 78712, USA Received October 26, 2019; revised April 23, 2020; accepted May 24, 2020 ©2020 Chinese Ocean Engineering Society and Springer-Verlag GmbH Germany, part of Springer Nature Abstract The floating offshore wind turbine (FOWT) is widely used for harvesting marine wind energy. Its dynamic responses under offshore wind and wave environment provide essential reference for the design and installation. In this study, the dynamic responses of a 6MW Spar type FOWT designed for the water depth of 100 m are investigated by means of the wave tank experiment and numerical analysis. A scaled model is manufactured for the experiment at a ratio of 65.3, while the numerical model is constructed on the open-source platform FAST (Fatigue, Aerodynamics, Structures, and Turbulence). Still water tests, wind-induced only tests, wave-induced only tests and combined windwave-current tests are all conducted experimentally and numerically. The accuracy of the experimental set-up as well as the loading generation has been verified. Surge, pitch and heave motions are selected to analyze and the numerical results agree well with the experimental values. Even though results obtained by using the FOWT calculation model established in FAST software show some deviations from the test results, the trends are always consistent. Both experimental and numerical studies demonstrate that they are reliable for the designed 6MW Spar type FOWT. Key words: floating offshore wind turbine, dynamic responses, Spar type platform, FAST, model test Citation: Meng, L., He, Y. P., Zhao, Y. S., Yang, J., Yang, H., Han, Z. L., Yu, L., Mao, W. G., Du, W. K., 2020. Dynamic response of 6mw spar type floating offshore wind turbine by experiment and numerical analyses. China Ocean Eng., 34(5): 608–620, doi: https://doi.org/10.1007/s13344-020-0055-z
1 Introduction In recent decades, energy consumption has enormously increased worldwide. In accordance with the Kyoto Protocol, the goal of producing 22.1% of energy
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