Displacement Response of Tower-wire-system under Wind-induced Vibration

In order to study the influence of wires and ground wires on the vibration displacement response of tower-wire-system, this paper constructs a physical model of a single transmission tower and tower-wire-system based on actual engineering data of transmission towers, wires, ground wires, and conducts finite element simulation analysis of vibration displacement response. Select Kaimal spectrum to simulate strong wind fields, and compare and analyze the displacement and vibration response of the single tower and tower-wire-system under wind speed for 35 m/s, 45 m/s, 55 m/s, and wind deflection angle for 45 °, 60 °, and 90 °. The results show that the ground wire structure reduces the first-order resonance response frequency of the tower-wire-system, amplifies the resonance response of the tower under pulsating wind, and the transmission of wind loads by grounding wire structure makes the displacement response of the tower-wire-system more significant than that of a single tower. The tower-wire-system is more sensitive to changes in wind deflection angle. When the wind deflection angle increases from 45 ° to 90 ° under a wind speed of 45 m/s, the displacement response of a single tower top increases by 43.7%, while the tower-wire-system increases by 60%.