Study on the influence of galloping alternating load on bolt loosening of tower

Guiqing Liu; Lei Zhang; Jingshan Han; Mengxuan Li; Hongzhi Su; Tianjiao Qiao

doi:10.1117/12.3015846

6 February 2024 Study on the influence of galloping alternating load on bolt loosening of tower

Guiqing Liu, Lei Zhang, Jingshan Han, Mengxuan Li, Hongzhi Su, Tianjiao Qiao

Proceedings Volume 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023); 129793S (2024) https://doi.org/10.1117/12.3015846
Event: 9th International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 2023, Guilin, China

Abstract

The galloping of overhead transmission lines can cause damage to equipment such as conductors, drainage lines, insulators, and towers. In this paper, the loosening of bolts under vibration is studied, and it is found that the vibration frequency has a significant impact on bolt loosening. With the increase of vibration frequency, the risk of bolt loosening increases. At the same time, under quasi-static and different frequencies, the axial pre-tightening force of bolts decreases with the increase of cycle number. When the transverse vibration amplitude is less than a certain critical value, the bolts are basically not loose. When the transverse vibration amplitude is greater than a certain critical value, the larger the transverse vibration amplitude, the easier it is to loosen the bolts. In addition, the friction coefficient will also affect the loosening behavior of bolts. These results can provide reference for predicting the fatigue life of bolted connection structures. Therefore, in practice, attention should be paid to controlling the transverse vibration amplitude and friction coefficient to avoid bolt loosening.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Guiqing Liu, Lei Zhang, Jingshan Han, Mengxuan Li, Hongzhi Su, and Tianjiao Qiao "Study on the influence of galloping alternating load on bolt loosening of tower", Proc. SPIE 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 129793S (6 February 2024); https://doi.org/10.1117/12.3015846

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