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

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.