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.
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