RISK ANALYSIS OF OFFSHORE WIND BUCKET FOUNDATION PENETRATION INTO SOIL

Wen Feng; Liu Run; Meng Xiangchuan; Hou Ge

doi:10.19912/j.0254-0096.tynxb.2023-1403

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (1) : 115-124. DOI: 10.19912/j.0254-0096.tynxb.2023-1403

RISK ANALYSIS OF OFFSHORE WIND BUCKET FOUNDATION PENETRATION INTO SOIL

Wen Feng¹, Liu Run¹, Meng Xiangchuan¹, Hou Ge²

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Abstract

The response surface method based on the nuclear limit learning machine is applied to the risk assessment of penetration of the bucket foundation, and the 6.45 MW bucket foundation of a wind farm in the sea area1 （successful installation） and the sea area 2 （installation failure） is the object of the study, and the Montecarlo sampling method is used to randomly generate the cone tip resistance （qs） in the geophysical static sounding （CPT）, and the method based on the CPT recommended value and the maximum value is used to predict the sinking required differential pressure, and the maximum differential pressure that can be provided by the pumps is the risk factor. The maximum differential pressure that can be provided is the risk control standard, and the probability of failure of the two machine positions for penetration into soil is obtained to assess the risk of penetration of the two machine positions. The results show that： the greater the spatial variability of the soil body, the greater the probability of the risk of penetration of the bucket foundation. When the coefficient of variation of soil body C_V≤0.3, and the failure probability of penetration resistance calculated by using CPT recommended value are less than 10^-4, the risk is low and can be used to guide the construction.

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offshore wind power / bucket foundation / penetration resistance / risk analysis

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Wen Feng, Liu Run, Meng Xiangchuan, Hou Ge. RISK ANALYSIS OF OFFSHORE WIND BUCKET FOUNDATION PENETRATION INTO SOIL[J]. Acta Energiae Solaris Sinica. 2025, 46(1): 115-124 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1403

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