FATIGUE ANALYSIS OF PILE FOLLOWER UNDER IMPACT LOAD FOR PILE FOUNDATION OF OFFSHORE BOOSTER STATION

Wang Qingpeng; Zhang Minghua

doi:10.19912/j.0254-0096.tynxb.2023-1379

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (1) : 88-96. DOI: 10.19912/j.0254-0096.tynxb.2023-1379

FATIGUE ANALYSIS OF PILE FOLLOWER UNDER IMPACT LOAD FOR PILE FOUNDATION OF OFFSHORE BOOSTER STATION

Wang Qingpeng¹, Zhang Minghua²

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Abstract

Due to the interference between jacket sleeve and hammer during underwater piling of offshore booster station, a pile follower should be installed between pipe pile and hammer. The service life of pile follower, which has been subjected to large energy hammer load for a long time, is not clear as yet. To solve this problem, the piling of an offshore booster station jacket is taken as the research background, the impact stress of pile follower is solved based on one-dimensional longitudinal wave theory, and pile follower model is established by using Solidworks software. The stress distribution and fatigue damage of the pile follower under periodic impact load are simulated numerically, and the real-time stress data of pile follower is obtained by high-strain monitoring equipment. The results show that the maximum stress position of pile follower is same under different impact energy, and the fatigue life of pile follower is inversely proportional to impact energy. The error between simulated stress value of pile follower and high-strain monitoring stress value is only 2.77% after considering energy dissipation.

Key words

offshore wind power / pile follower / impact stress / fatigue analysis / numerical simulation

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Wang Qingpeng, Zhang Minghua. FATIGUE ANALYSIS OF PILE FOLLOWER UNDER IMPACT LOAD FOR PILE FOUNDATION OF OFFSHORE BOOSTER STATION[J]. Acta Energiae Solaris Sinica. 2025, 46(1): 88-96 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1379

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