DAMAGE IDENTIFICATION OF WIND TURBINE TOWER SEGMENT FLANGE BOLT FRACTURE BASED ON VIBRATION RESEARCH

Pang Heqing; Zhang Wanfu; Zhang Shidong; Xue Congcong; Liu Bing; Li Chun

doi:10.19912/j.0254-0096.tynxb.2024-1276

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (11) : 704-712. DOI: 10.19912/j.0254-0096.tynxb.2024-1276

DAMAGE IDENTIFICATION OF WIND TURBINE TOWER SEGMENT FLANGE BOLT FRACTURE BASED ON VIBRATION RESEARCH

Pang Heqing¹, Zhang Wanfu^1,2, Zhang Shidong³, Xue Congcong¹, Liu Bing¹, Li Chun^1,2

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Abstract

To address the problem of damage identification of wind turbine tower flange bolts, this paper proposes a detection method of bolt fracture damage identification using vibration signal response, and establishes a damage identification index based on the absolute rate of change of vibration response energy based on the damage identification theory of frequency response function. Taking a 1.5 MW wind turbine as the research object, the strain, displacement and acceleration signals are compared and analyzed by numerical simulation, and the identification effect of the index under different damage conditions is obtained. The results show that the absolute rate of change of vibration energy based on strain response shows higher sensitivity and accuracy in identifying the bolt fracture damage compared with the displacement and acceleration response signals, and the energy damage indicator based on strain response shows a significant change at the bolt fracture damage site, which can accurately identify the bolt fracture damage location of the tower section flange of the wind turbine.

Key words

wind turbine tower / damage identification / bolt fracture / finite element method / flange bolts / vibration characteristics

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Pang Heqing, Zhang Wanfu, Zhang Shidong, Xue Congcong, Liu Bing, Li Chun. DAMAGE IDENTIFICATION OF WIND TURBINE TOWER SEGMENT FLANGE BOLT FRACTURE BASED ON VIBRATION RESEARCH[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 704-712 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1276

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