SEISMIC RESPONSE ANALYSIS OF FLOATING WIND TURBINE SUCTION BUCKET FOUNDATION CONSIDERING SCOUR

Su Yuming; Cheng Xinglei; Zhang Jianxin; Liu Ju; Wang Mingyuan

doi:10.19912/j.0254-0096.tynxb.2024-2008

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 384-391. DOI: 10.19912/j.0254-0096.tynxb.2024-2008

SEISMIC RESPONSE ANALYSIS OF FLOATING WIND TURBINE SUCTION BUCKET FOUNDATION CONSIDERING SCOUR

Su Yuming¹, Cheng Xinglei¹, Zhang Jianxin¹, Liu Ju¹, Wang Mingyuan²

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Abstract

This study leverages the FLAC 3D finite difference software platform and utilizes the SANISAND constitutive model to simulate the stress-strain behavior of sand soil. It systematically investigates the dynamic behavior of suction bucket foundations under the combined action of vertical tensile loads and seismic loads in the context of local scour conditions. The findings reveal that seismic actions can induce cumulative vertical displacement in suction buckets subjected to vertical tensile loads, potentially leading to foundation failure due to excessive displacement. Scour exacerbates this issue by increasing the depth of liquefied sand under seismic loading, reducing the bucket-soil frictional resistance, and diminishing the uplift capacity of the suction bucket, thereby further compromising the foundation's integrity. Additionally, the degree of liquefaction in the surrounding sand decreases with decreasing distance from the outer wall of the suction bucket in the horizontal direction. Notably, the cumulative pore pressure inside the suction bucket is significantly lower than that outside, indicating that the presence of the suction bucket exerts a substantial inhibitory effect on the liquefaction of the surrounding sand.

Key words

offshore wind power / liquefaction / scour / suction bucket foundation / earthquake loads / tensile load

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Su Yuming, Cheng Xinglei, Zhang Jianxin, Liu Ju, Wang Mingyuan. SEISMIC RESPONSE ANALYSIS OF FLOATING WIND TURBINE SUCTION BUCKET FOUNDATION CONSIDERING SCOUR[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 384-391 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2008

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