Optimization and Response Analysis of Floating Truss Foundation for Offshore Wind Turbine

doi:10.11930/j.issn.1004-9649.202107118

Abstract

Abstract: In the context of increasingly severe environmental problems, optimizing the form of floating foundations becomes a major way for offshore wind engineering to reduce costs and increase efficiency. This study optimized the structure of a new floating truss foundation for a wind turbine with dual anti-sway mechanisms and conducted the parametric analysis of the different layout forms of the truss structure to find the most suitable tie rod layout form for the floating truss foundation. At the same time, the hydrodynamic response analysis of the optimized floating truss foundation was carried out to verify the feasibility of the optimized scheme. The results showed that in terms of the tie rod layout of the truss, the angle between the diagonal tie rod and the corner column should not be set to a large value, and reducing the cross-sectional area of horizontal tie rods and increasing that of diagonal tie rods could more effectively improve the lateral stiffness and load-bearing capacity of the structure. After optimization, the force performance of the floating foundation is better than that of the original floating truss foundation, and the economical efficiency of floating truss foundation is enhanced greatly. Meanwhile, its natural period on each degree of freedom is much larger than the typical wave period, which indicated a good seakeeping performance.

Key words: offshore wind turbine, floating wind turbine, truss foundation, tower form, structural optimization, hydrodynamic characteristics

WANG Yuhang, WANG Wenling, ZHOU Xuhong, WANG Kang, LUO Yintao. Optimization and Response Analysis of Floating Truss Foundation for Offshore Wind Turbine[J]. Electric Power, 2022, 55(5): 21-31.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202107118

https://www.electricpower.com.cn/EN/Y2022/V55/I5/21

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