FATIGUE PERFORMANCE ANALYSIS OF PREFABRICATED RAFT FOUNDATION STRUCTURE FOR ONSHORE WIND TURBINES

Bai Jiulin; Xiao Zonghan; Wang Ruiyi; Wang Yuhang; Yang Qingshan

doi:10.19912/j.0254-0096.tynxb.2024-1629

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 634-644. DOI: 10.19912/j.0254-0096.tynxb.2024-1629

FATIGUE PERFORMANCE ANALYSIS OF PREFABRICATED RAFT FOUNDATION STRUCTURE FOR ONSHORE WIND TURBINES

Bai Jiulin^1,2, Xiao Zonghan^1,2, Wang Ruiyi^1,2, Wang Yuhang^1,2, Yang Qingshan^1,2

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Abstract

To investigate the fatigue performance of prefabricated beam-slab foundations under wind-induced cyclic loads, an integrated analytical finite element model of the prefabricated foundation-soil-turbine unit-tower was established. On this basis, the thrust coefficient method was adopted to simulate the wind load time history of the impeller, while considering the wake effect of the tower wind field. The dynamic response of the prefabricated foundation under rated and shutdown operating conditions was analyzed, and the fatigue hotspots of the foundation were identified. Finally, a fatigue performance analysis method based on the S-N curve and considering the combined effects of wind speed and direction was established. According to the hotspot stress time history data under various fatigue conditions, the fatigue life of the hotspots of the prefabricated foundation was evaluated. The results show that： the fatigue damage of the cast-in-place joint of the new prefabricated beam-slab foundation is mainly caused by the rated operating condition wind speed segment in the vertical wind direction; the joint will not suffer from fatigue failure within the design life of the turbine unit, and the prefabricated foundation exhibits excellent fatigue performance.

Key words

wind turbines / prefabricated foundation / fatigue damage / finite element analysis / wind load / dynamic response analysis

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Bai Jiulin, Xiao Zonghan, Wang Ruiyi, Wang Yuhang, Yang Qingshan. FATIGUE PERFORMANCE ANALYSIS OF PREFABRICATED RAFT FOUNDATION STRUCTURE FOR ONSHORE WIND TURBINES[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 634-644 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1629

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