覆冰导线脱冰特性的研究  

Research on the Dynamic Property of Conductor Galloping Due to Ice-Shedding

作　　者：王洪喜[1] 李凯[1] 贾建军[1] 

机构地区：[1]西安工业大学机电工程学院,西安710032

出　　处：《光纤与电缆及其应用技术》2012年第6期36-39,共4页Optical Fiber & Electric Cable and Their Applications

基　　金：西安市科技局自然基金资助项目(CXY1017(5))

摘　　要：针对导线覆冰脱冰引起的舞动问题,采用模拟实验与有限元数值计算相结合的方法,研究导线脱冰舞动的时间响应。由两端固定支座的钢丝绳模拟输电导线,通过加载集中质量模拟导线的覆冰,释放集中质量并记录时间响应曲线,根据振幅衰减系数计算系统的阻尼比。利用实验装置相关参数和有限元分析软件ANSYS建立有限元模型,输入实验得到的瑞利阻尼参数,采用集中力法模拟计算覆冰导线的脱冰动力响应。结果显示实验与仿真计算获得的导线中点时间响应是一致的,也证明了有限元数值方法分析覆冰导线的脱冰舞动是可行和准确的。Aiming at the issue of conductor galloping caused by ice-shedding on overhead transmission lines.Experiment and finite element method are used to study the dynamic response of conductor galloping due to ice-shedding.A piece of wire rope whose ends are clamped is used to simulate an overhead transmission line.The concentrated mass is imposed to simulate the ice-accretion,and then the time response curve of the conductor galloping after releasing the mass is recorded.Finally,the subsidence ratio of the system is calculated according to the amplitude damping factor.On the basis of experiment,a finite element model of conductor is built using ANSYS software,then the Rayleigh damping parameter obtained from the experiment is input;and concentrated force method is adopted to study the dynamic response of ice-accreting conductor.The results show that the time response of conductor galloping obtained by experiment is consistent with that from the simulation,and finite element method is feasible and accurate for analyzing the conductor galloping on ice-accreting conductor due to ice-shedding.

关 键 词：导线舞动 覆冰 脱冰 数值方法 有限元仿真 

分 类 号：TM75[电气工程—电力系统及自动化]