覆冰导线舞动作用下输电塔破坏机理的试验研究

杨 伦;楼文娟;陈 勇;阎 东;杨晓辉

振动与冲击 ›› 2013, Vol. 32 ›› Issue (24) : 70-75.

PDF(1891 KB)
PDF(1891 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (24) : 70-75.
论文

覆冰导线舞动作用下输电塔破坏机理的试验研究

  • 杨 伦1,楼文娟1,陈 勇1,阎 东2,杨晓辉2
作者信息 +

An Experimental Study on Failure Mechanism of Transmission Tower under Iced Conductor Galloping

  • Yang Lun 1, Lou Wen-Juan 1,Chen Yong1,Yan Dong2, Yang Xiao-hui2
Author information +
文章历史 +

摘要

以某型号转角耐张塔为研究对象,基于模型相似理论,设计制作了覆冰导线模型和弹性边界条件下的大比例输电塔节段模型,并根据覆冰导线舞动特征,研制了用于模拟导线舞动的动力加载装置。同时,结合实际线路舞动时的特征参数,于试验室条件下进行了覆冰塔线体系舞动事故的反演,并根据试验测得的构件动应力幅值,计算了输电塔构件在导线舞动作用下的疲劳寿命。研究结果表明:该输电塔在导线舞动作用下的失效并非由构件承载力不足和疲劳损伤而造成的,其原因在于构件连接螺栓在导线舞动产生的大幅动张力作用下发生松动,使部分构件的内力重分配,导致某些杆件受力过大而发生破坏,从而引发了输电塔的失稳甚至倒塌。

Abstract

Based on the similarity theory of dynamic model,a tower segmental model with elastic boundary condition and iced conductor model were founded with large–scale. According to dynamic characteristic of iced conductor galloping, the vibration experimental equipment used to simulate galloping responses of iced-conductor was developed. On the basis of conductor ice thickness and vibration amplitude obtained by field testing, the dynamic experiment of transmission tower-line was carried out under conductor galloping. Combining with the experimental results of dynamic stress, fatigue life of tower member was estimated. It was shown that failure mechanism of tower is not insufficient bearing capacity of members and fatigue damage, the real reason is the connection bolts of members loose under dynamic tension produced by conductor galloping, and make the main components of tower internal force redistribute, thus certain members are destroyed subjected to excessive force , which result in collapse and instability of transmission towers.

关键词

覆冰导线 / 输电塔节段模型 / 舞动试验装置 / 疲劳破坏 / 螺栓松动.

Key words

iced conductor / transmission tower segmental model / galloping experimental equipment / fatigue failure / bolts looseness.

引用本文

导出引用
杨 伦;楼文娟;陈 勇;阎 东;杨晓辉. 覆冰导线舞动作用下输电塔破坏机理的试验研究[J]. 振动与冲击, 2013, 32(24): 70-75
Yang Lun;Lou Wen-Juan;Chen Yong;Yan Dong;Yang Xiao-hui. An Experimental Study on Failure Mechanism of Transmission Tower under Iced Conductor Galloping[J]. Journal of Vibration and Shock, 2013, 32(24): 70-75

PDF(1891 KB)

Accesses

Citation

Detail

段落导航
相关文章

/