Abstract
In this study, a new conceptual cross-shaped multi-column spar foundation is proposed for floating offshore wind turbines. This foundation consists of a reinforced concrete cross pontoon, a central steel column, and four side steel columns symmetrically distributed on pontoon ends. This foundation is meant for the economical wind power exploitation particularly in finite water depth ranging from 30 to 100 m. Using a 2 MW wind turbine in 100 m water as the prototype, comprehensive experimental studies are carried out at Tsinghua University Ocean Basin with a 1/20th scale under the Froude law to investigate the dynamic responses of this novel floater. In order to emulate the real mooring system, a truncated catenary mooring arrangement is optimized in the experiment. Model tests have been performed in different environmental loadings, including regular and irregular waves, steady winds, and their couplings to investigate the dynamic characteristics pertaining to structural safety. The obtained motion response amplitude operators (RAOs) and spectral responses demonstrate that this cross-shaped and multi-column spar wind turbine owns excellent dynamic performance in severe wave and wind conditions.
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Acknowledgements
The financial supports received from 2020 Open Fund Projects of Key Laboratory of Far-shore Wind Power Technology of Zhejiang Province and China National Science Foundation Program (52071186) are greatly acknowledged.
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Ci, X., Li, W., Lei, Y., Gao, S., Zhang, S., Zheng, X.Y. (2023). Experimental Study on the Dynamic Responses of a 2 MW Cross-Shaped Multi-Column Spar Floating Offshore Wind Turbine. In: Baeyens, J., Dewil, R., Rossi, B., Deng, Y. (eds) Proceedings of 2022 4th International Conference on Environment Sciences and Renewable Energy. ESRE 2022. Environmental Science and Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-9440-1_11
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DOI: https://doi.org/10.1007/978-981-19-9440-1_11
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