Recently

the transmission lines frequently experienced such accidents as wind deviation flashover in Xizang due to its high-altitude and windy environment

with transmission lines with ‘cup-type’ steel tower with an extraordinary characteristic of uneven body shape in particular. In view of this

the research on the design of wind induced vibration and vibration coefficient of ‘cup-type’ tower-line system of transmission line project in Xizang is performed in this paper in order to provide necessary theoretical basis for the reasonable wind resistance design of related transmission line. The research process and method is the ‘cup-type’ transmission tower-line section with actual fault in Xizang is taken as the research object. The wind induced vibration simulation and analysis method of the transmission tower and line system

namely Davenport wind power spectrum and AR model

is used to simulate the fluctuating wind load and apply to the finite element model of the transmission tower-line system to calculate the dynamic response and wind induced coefficient of the transmission tower in combination with random vibration theory. The method is used for simulation and analysis of the transmission line to discuss the vibration response characteristics and the wind induced coefficient influence of the tower-line system under strong wind environment and different wind angels. Then

the simulation result is compared with the existing design specification to verify the unreasonable phenomena existed in the wind resistance design of the existing specification and to be improved. On this basis

the design correction formula of wind vibration coefficient of the transmission tower-line system is proposed in this paper

which has the overall error within 10% and accurately reflect the actual wind vibration effect of the related line of the ‘cup-type’ transmission tower in Xizang. The research in this paper provides an important solution for rational wind resistance design of ‘cup-type’ transmission towers in windy environment areas (such as Xizang) and has a good application prospect.