TOPOLOGY OPTIMIZATION METHOD ON JACKET STRUCTURE OF OFFSHORE WIND TURBINE BY VARYING LEG DISTANCES

Zhang Jinhua; Du Jiazheng; Long Kai; Yao Xishan; Lu Feiyu; Geng Rongrong

doi:10.19912/j.0254-0096.tynxb.2023-1055

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (11) : 427-432. DOI: 10.19912/j.0254-0096.tynxb.2023-1055

TOPOLOGY OPTIMIZATION METHOD ON JACKET STRUCTURE OF OFFSHORE WIND TURBINE BY VARYING LEG DISTANCES

Zhang Jinhua¹, Du Jiazheng¹, Long Kai², Yao Xishan^2,3, Lu Feiyu², Geng Rongrong²

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Abstract

To further improve the mechanical properties of the support structure of the offshore wind turbine, a topology optimization design method is proposed by adjusting the leg distance to change the design domain. A multi-objective normalized weighted compliance minimum optimization model is established while the volume fraction and engineering manufacturing constraints are imposed as constraints. The variations of optimized topologies are analyzed. Based on IEC 61400-3 specification and finite element analysis, the ultimate load calculation and the ultimate working condition analysis of jacket are performed. Compared with NREL 5 MW offshore wind turbine, the mechanical performance of a series of optimized topologies with various leg spacing corresponding to the adjustable design domain are superior in terms of fundamental natural frequency, maximum displacement and maximum pull-out force. By altering the design domain of leg distance, the optimization results illustrate that the proposed topology optimization approach is feasible and advantageous in jacket design.

Key words

offshore wind turbines / structural design / multiobjective optimization / supports / volume fraction / natural frequencies

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Zhang Jinhua, Du Jiazheng, Long Kai, Yao Xishan, Lu Feiyu, Geng Rongrong. TOPOLOGY OPTIMIZATION METHOD ON JACKET STRUCTURE OF OFFSHORE WIND TURBINE BY VARYING LEG DISTANCES[J]. Acta Energiae Solaris Sinica. 2024, 45(11): 427-432 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1055

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