Wind-induced Reponse Analysisof Transmission-line System Under The Typhoon

With the rapidly economic development in recent years,high-rise buildings and largespan structures in the coastal areas of China.Wind resistance design becomes the main design for these wind sensitive structures.Typhoon could bring great damages,especially for the low houses,billboards,transmission towers and the other similar constructions(structures).On the one hand,there is no clear rules for design wind speed caused by typhoon presently because of typhoon data is scarce,difference of typhoon itself,meanwhile the complicated turbulence mechanism.On the other hand,our design standards does not take into account the coupling interaction of towers and lines,lines just as load only.So it's necessary to consider the coupling interaction of tower and line under typhoon circumstance,which could improve the design ability for transmission system in typhoon conditions and the other similar extreme conditions.Firstly,improving existed typhoon field model to a new model and obtain exact expression of wind profile,then using the existed typhoon parameters validate the wind profile expression.A spatial 3-D finite element model of mulit-tower-line coupled is established by ANSYS software,which takes into account of the nonlinear impact of transmission lines and insulators.Then verify the finite element model by model analysis.Next,obtain different wind environment load data of mulit-tower-line coupled system through numerical simulation for the stationary and non-stationary wind field respectively.Finally,the wind-induced vibration responses for the mulit-tower-line coupled system are obtained.Through compare wind vibration response results under stationary wind of tower and tower-line system,which means it is necessary to consider the effect of transmission line in the wind resistance design.Through compare wind vibration response results under tower-line system of stationary and non-stationary wind,which means it is necessary to improve the design code for constructions under non-stationary wind.