Mechanical analysis of transmission lines based on linear sliding cable element  

基于直线型滑移索单元的输电线路结构张力分析(英文)

作　　者：刘云[1,2] 钱振东[2] 夏开全[3] 

机构地区：[1]河海大学土木与交通学院,南京210098 [2]东南大学智能运输系统研究中心,南京210096 [3]中国电力科学研究院,北京100192

出　　处：《Journal of Southeast University(English Edition)》2013年第4期436-440,共5页东南大学学报（英文版）

基　　金：The National Natural Science Foundation of China (No.51308193);China Postdoctoral Science Foundation (No.20110491342);Jiangsu Planned Projects for Postdoctoral Research Funds(No.1101018C);the Science and Technology Project of State Grid Corporation of China(No.SGKJ[2007]116)

摘　　要：In order to study the sliding characteristics when the cable structures are connected with other rods, a string of sliding cable dements （SCE） consisting of one active threenode SCE passing through the sliding point and multiple inactive two-node SCEs is put forward. Based on the updated Lagrangian formulation, the geometric nonlinear stiffness matrix of the three-node straight sliding cable dement is deduced. The examples about two-span and three-span continuous cable structures are studied to verify the effectiveness of the derived SCE. Comparing the cable tension of SCE with the existing research results, the calculating results show that the error is less than 1%. The sliding characteristics should be considered in practical engineering because of the obvious difference between the cable tension of the SCE and that of the cable element without considering sliding characteristics.为了研究高压架空输电线索结构与塔架等其他杆件连接处的滑移特性,定义了一组滑移索单元,由一个通过滑动节点连接的三节点活动滑移索单元和多个两节点非活动滑移索单元组成.基于更新拉格朗日格式推导了三节点直线型滑索单元几何非线性刚度矩阵,并通过两跨和三跨等高连续索结构的有限元数值算例验证了空间直线型滑移索单元的有效性.研究结果表明,推导的直线型滑移索单元张力与已有计算结果相比,误差在1%以内.考虑滑移的索结构初始平衡状态内力与不考虑滑移的情况比较相差较大,因而在实际工程中应该考虑索的滑移.

关 键 词：transmission line sliding cable element updated Lagrangian formulation geometric nonlinear 

分 类 号：TM753[电气工程—电力系统及自动化]