Abstract
The wind load is considered as two parts, high frequency part of wind load is considered as dynamic load, while the wind load caused by average wind speed can be considered as dead load. The dead load part of the wind load causes the change of the tension force of the transmission line, and changes the vibration balance position of the transmission line at the same time. The dynamic equation of transmission line under strong wind load is derived by using dynamic theory. Considering the dynamic action of wind load as simple harmonic load, the response of transmission line under dynamic wind load is studied. The results show that there are complex nonlinear phenomena, such as subharmonic resonance and super harmonic resonance, in addition to the main resonance. In particular, vertical excitation may cause large horizontal vibration of transmission lines, which is very harmful to the safety of transmission towers. The research results have certain theoretical significance for the study of wind- induced vibration control of transmission lines.
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