F型特高压输电塔风振响应分析

Analysis on wind-induced vibration response of F-shaped ultra-high voltage(UHV) transmission tower

F型输电塔在电网走廊较为紧张的地区有较为广泛的应用前景,目前关于F型输电塔风振响应方面的分析还较少。以某F型输电塔作为研究对象,采用有限元软件ANSYS研究了单塔与其塔-线体系的动力特性,并进行了风振动力响应分析。分析结果表明,考虑导线的影响会提高输电塔的刚度,同时对整体结构的扭转具有抑制作用;下横担扭转角相对塔顶角与上横担扭转角更大,在设计时需要更多地考虑下横担处的扭转,并做相应的结构加强处理。

F-shaped transmission tower has a wide range of application prospects in areas where the grid corridors are relatively tight. At present,there are few analyses on the wind-induced vibration response of the F-shaped transmission tower. Taking a F-shaped transmission tower as the research object,the dynamic characteristics of the single tower and its tower-line system were studied using the finite element software ANSYS,and the wind-induced vibration dynamic response analysis was performed. The analysis results show that taking the influence of the line into account will increase the stiffness of the transmission tower and at the same time suppress the torsion of the overall structure; the torsion angle of lower transverse arm is greater than top cornor angle of the tower and the torsion angle of upper transverse arm,so the torsion at lower transverse arm needs more consideration in design and corresponding structural strengthening.