摘要
风害是引起输电杆塔故障的重要原因之一。研究风荷载作用下输电杆塔的应力分布特征,明确风害造成输电杆塔故障的机理,对于输电杆塔风害的防治具有重要的作用和意义。基于此,以典型的500kV超高压CJ1-30型耐张塔为例,建立有限元分析模型,对不同风荷载条件下输电杆塔的应力分布特征进行分析。结果表明,杆塔主材的坡面过渡位置是受力的薄弱点,并建议电网运行单位在年度运维检修中予以重点关注。
The wind-induced disaster is one of the important cause of transmission tower failure. It has an importantrole and significance for the prevention of transmission tower wind to study the stress distribution characteristics oftransmission tower under the action of wind load, to understand the mechanism of transmission tower failure causedby the wind. Based on this, taking the typical 500 kV transmission tower with CJ1-30 type as an example, the stressdistribution characteristics of transmission tower under the action of wind load were analyzed by setting up the analyt-ical model of finite unit. Then the stress distribution characteristics of transmission tower are analyzed under the con-dition of different wind load. The results showed that the transition point of the slope of tower advocate material wasthe weak spot of structure stress, and it was suggested that the transition point of the slope of tower advocate materialshould be pay more attention in the annual maintenance and repair of grid operation units.
出处
《河南科技》
2016年第19期135-137,共3页
Henan Science and Technology
关键词
风荷载
输电杆塔
应力分布
wind load
transmission tower
stress distribution
