FATIGUE ANALYSIS OF OFFSHORE WIND TURBINE FOUNDATION BASED ON INTEGRATED COUPLING TECHNOLOGY

Zhang Xiaowei; Chen Bangmin; Guo Wenjun; Le Conghuan; Zhang Puyang

doi:10.19912/j.0254-0096.tynxb.2024-1627

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 613-620. DOI: 10.19912/j.0254-0096.tynxb.2024-1627

FATIGUE ANALYSIS OF OFFSHORE WIND TURBINE FOUNDATION BASED ON INTEGRATED COUPLING TECHNOLOGY

Zhang Xiaowei¹, Chen Bangmin², Guo Wenjun³, Le Conghuan³, Zhang Puyang³

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Abstract

To investigate fatigue analysis methods for offshore wind turbine foundations under integrated coupling design, a fully coupled "wind turbine-tower-foundation" model is established using Sesam software, and an integrated design workflow for offshore wind turbines foundation is developed. Based on this model, sensitivity analyses of environmental parameters are conducted, the linear superposition and combined action effects of wind- and wave-induced fatigue damage are compared, and the differences between integrated design and conventional iterative design are evaluated in terms of foundation loading characteristics and steel consumption. Results show that among the four key environmental parameters （wind speed, water depth, wave height, and wind-wave angle）, the fatigue response of the monopile foundation is most sensitive to wind speed variations. The fatigue damage under combined loading is on average 26.50% higher than that obtained from linear superposition. Compared with conventional iterative design, integrated design can significantly reduce foundation steel usage by appropriately increasing the steel consumption of the tower, thereby optimizing the total steel consumption of the "tower+foundation". In this case study, the total steel consumption is reduced by 10.11%.

Key words

offshore wind power / fatigue damage / sensitivity analysis / integrated coupling design / pile foundations / structural optimization

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Zhang Xiaowei, Chen Bangmin, Guo Wenjun, Le Conghuan, Zhang Puyang. FATIGUE ANALYSIS OF OFFSHORE WIND TURBINE FOUNDATION BASED ON INTEGRATED COUPLING TECHNOLOGY[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 613-620 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1627

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