Research of Wind-induced Vibration Coefficient for Transmission Towers using Lead Rubber Dampers

Based on the Xiangjiaba-Shanghai,Jinping-Sunan's special high-voltage DC ± 800kV transmission line project,the lead rubber damper(LRD) applied for controlling wind-induced vibration of transmission towers is introduced.According to the numerical simulation of three dimensional finite element and wind loads,the wind-induced vibration response of single-tower and tower-line under wind load are obtained,the effects of wind-induced vibration control are also discussed.The transmission tower's wind-induced vibration coefficient can be calculated according to the results of time-history analysis,the comparison of the wind-induced vibration coefficient with that in Code are carried.There is a sudden change in the crossarm position of the transmission tower to the wind-induced vibration coefficient,the present standards are unable to consider it,on which the attention should be paid.The quality,rigidity and the damping of the transmission tower-line system are increased by the transmission lines,resulting in the reduction of the tower vibration response,so the impact of coupling should be considered in wind-tower design.The wind-induced vibration coefficient obtains effective reduction by using the LRDs,and the reduction ratio is gradually increased along the tower.