覆冰作用下架空地线股线应力特性研究  

Investigation on Stresses of Single Wire of Overhead Ground Wires Subjected to Icing Loading

作　　者：刘文杰 LIU Wen-jie(Key Laboratory of Roadway Bridge and Structural Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点实验室

出　　处：《建材世界》2019年第3期109-111,135,共4页The World of Building Materials

基　　金：南方电网公司科技项目(GDKJXM20161994(030800KK52160004));住建部科技计划项目(2017-K5-003)

摘　　要：为了研究架空地线的股线应力特点,首先基于有限元理论建立了架空地线的精细模型。在此基础上,建立了架空地线的应力分析方法和计算方法。最后,分别研究了架空地线在覆冰荷载作用下各股线的受力特性。算例研究表明:地线在覆冰荷载作用下其张力显著增加,外层股线在轴力作用下伸长并对内层钢芯产生挤压效应。无论是对于内层钢芯还是外层股线而言,其轴应力峰值较为接近。In order to study the characteristics of the stresses of a single wire of overhead ground wire,a fine model of overhead ground wire was established based on the finite element theory.On this basis,the analysis and calculation method of the stress of the overhead ground wire were established.Finally,the stress characteristics of the overhead ground wire under ice load were studied respectively.The results show that the tension of ground wire increases significantly under the ice load,and the outer strand elongates under axial force and produces extrusion effect on the inner steel core.Both for the inner layer for steel core and outer thread,the peak value of axial stress is close.

关 键 词：架空地线 覆冰荷载 单根股线 应力 

分 类 号：TM752[电气工程—电力系统及自动化]