摘要
以典型500 kV鼓型输电塔为研究对象,建立了输电塔三维有限元模型.在考虑各节点风力空间相关的条件下,利用Davenport风速功率谱对节点风力进行了数值模拟,对不同风向下塔的风振响应进行了分析,讨论了输电塔风致响应的特性.结果表明:输电塔平均位移响应主要为顺风向响应,横风向平均位移响应值接近于零;各个方向一阶振型在响应中起主导作用;顺风向关键节点位移响应因子约为2.0.
In this paper,the three-dimensional finite element model of a typical 500 kV high-voltage transmission tower is established.Under the consideration of the relevant conditions of wind space at each node,Davenport power spectrum is used to numerically simulate the wind speed of each node,and then the paper analyzes the wind induced vibration response in different wind directions of the tower,and discusses the characteristic of the wind induced response of the transmission tower.The results show that downwind displacement response is the major response for the average displacement response,and the mean across-wind response is nearly zero.In addition,the study shows that the first mode has dominant position in the responses in all directions.The downwind displacement response factor of critical nodes is about 2.0.
出处
《华北水利水电学院学报》
2012年第2期21-25,共5页
North China Institute of Water Conservancy and Hydroelectric Power
关键词
输电塔
风致响应
风荷载
阵风响应因子
transmission tower
wind-induced response
wind load
wind response factor
