DYNAMIC RESPONSE OF MULTI-BUCKET JACKET FOUNDATION FOR OFFSHORE WIND TURBINES UNDER STORM SURGE LOAD

Lu Mingjiao; Zhang Chenrong; Tian Shuping

doi:10.19912/j.0254-0096.tynxb.2025-0166

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (6) : 384-393. DOI: 10.19912/j.0254-0096.tynxb.2025-0166

DYNAMIC RESPONSE OF MULTI-BUCKET JACKET FOUNDATION FOR OFFSHORE WIND TURBINES UNDER STORM SURGE LOAD

Lu Mingjiao^1,2, Zhang Chenrong^1,2, Tian Shuping^1,2

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Abstract

To investigate the dynamic response of the multi-bucket jacket foundation of offshore wind turbines under storm surge load, this paper conducts a series of 1 g model tests using the motor servo random dynamic loading equipment. Then, the influence of different depth-to-diameter ratios of the suction bucket on the soil and structure is further investigated through numerical simulations. The results indicate that the extreme horizontal displacement of the structure rises as wind speed increases under storm surge conditions, and the amplification coefficient of horizontal displacement follows a trend of “increasing initially before decreasing”. The peak value of the Fourier amplitude spectrum for the nacelle position acceleration increases with the load, while the peak frequency exhibits a pattern of “decreasing first and then increasing”. As the depth-to-diameter ratio of the suction bucket increases, both the extreme horizontal displacement and the amplification of the structures coefficient corresponding decrease. A depth-to-diameter ratio of L/D= 0.5 is the least favorable, as it cannot withstand storm surge loads. The difference between depth-to-diameter ratios of 1.0 and 1.5 is negligible. Taking into account reliability and economy, a depth-to-diameter ratio of 1.0 is the optimal type. Different depth-to-diameter ratios also have the influence onthe rotation center of the SBJ foundation.

Key words

offshore wind turbines / dynamics response / storm surge load / model test / suction bucket jacket foundation / depth-to-diameter ratio

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Lu Mingjiao, Zhang Chenrong, Tian Shuping. DYNAMIC RESPONSE OF MULTI-BUCKET JACKET FOUNDATION FOR OFFSHORE WIND TURBINES UNDER STORM SURGE LOAD[J]. Acta Energiae Solaris Sinica. 2026, 47(6): 384-393 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0166

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