断线作用下干字型输电塔的力学特性分析

Analysis of Mechanical Characteristics of Dry-type Transmission Towers under Wire Breakage

导线断线严重地威胁着输电线路安全、平稳运行,断线产生的不平衡张力是造成杆塔结构破坏甚至倒塔的主要原因。本文以干字型输电塔对研究对象,利用ANSYS对断线工况下输电塔的力学特性进行分析。结果表明:断线工况下,干字型输电塔会发生沿线路方向的弯曲和绕输电塔中心轴线的扭转组合变形;相比断地线工况,断导线工况下塔材的应力更大,对输电塔的威胁更严重。

The serious disconnection of the conductor threatens the safe and smooth operation of the transmission line.The unbalanced tension generated by the broken line is the main reason for the destruction or even tower collapse of the tower structure.Therefore,the dry-type transmission tower is used for the research object,and ANSYS is used to analyze the mechanical characteristics of the transmission tower under the disconnected condition.The results show that under the condition of disconnection,the dry-type transmission tower will undergo bending along the line direction and the torsional combined deformation around the central axis of the transmission tower;compared with the grounding condition,the stress of the tower under the broken conductor condition is more Large,the threat to the transmission tower is more serious.