Experimental Investigation For The Wind Induced Vibration Of The Transmission Tower With Narrow Base

The failure of transmission line system under attack of strong wind is induced by traits of flexible, light and low damping, as well as reasons like extreme weather conditions, the large mass on top and the complicated wind load distribution on the tower. Due to the limitation researches on mechanical model of transmission line system, the method to describe wind load distribution on tower, the proposed approach is still unsatisfied to meet the needs to estimate wind induced transmission tower response. The aeroelastic model test in wind tunnel is one of the effective way to obtain the tower response, and it is used to study response of transmission tower with narrow base in present work.(1)Applying the discrete stiffness model, the wind tunnel tests were carried out to obtain response of transmission tower. In the matter of design model, this paper details the design of aeroelastic model, dynamic analysis of model set by ANSYS, manufacturing operation of aeroelastic model, the dynamics parameter of aeroelastic model. In the matter of wind tunnel tests, this paper details the simulation of wind field, test facility and experimental method to this electrical transmission tower aeroelastic model.(2)The variation of acceleration in both direction of along-wind and across-wind with wind direction was revealed, the variation of displacement with wind direction was also presented。(3)The spectra analysis technique was used to illustrate the dynamic characteristics with the acceleration spectra and displacement spectra in two directions.