输电线路铁塔导线耦合振动动力特性研究  

Dynamic Characteristics of Wind-Induced Coupled Vibration Between Conductor and Tower of Transmission Line

作　　者：杨靖波[1] 李正[1] 江俊[2] 

机构地区：[1]国网北京电力建设研究院,北京100055 [2]西安交通大学航天航空学院,西安710049

出　　处：《振动．测试与诊断》2008年第2期147-150,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家电网公司重大科技创新专项基金资助项目(编号:SGKJ[2007]110)

摘　　要：将输电塔和导线分别视为柔性悬臂梁和弦线,建立输电线路一塔两线的连续体简化力学模型。采用模态综合法研究分析塔横向振动与线面外振动耦合时的动力特性,给出铁塔与导线振动频率和振型的近似理论算法。针对典型线路的塔线耦合振动,分别采用理论算法和有限元方法对其动力特性做了计算。结果表明,两种方法获得的耦合系统的振动特性基本一致。A simplified mechanics model of a transmission line is established.The model is composed of one tower and two spans of conductors,where the tower is regarded as a cantilever beam and the conductor as a string.Using the model,dynamic characteristics of tower and conductor are studied with the modal synthesis method.Dynamic behaviours of a typical transmission line are calculated using the analytical method presented by this paper and the finite element method(FEM).Results show that the dynamic characteristics of the line from the two methods are almost the same.

关 键 词：输电线路 铁塔 导线 耦合振动 力学模型 动力特性 

分 类 号：TM726.3[电气工程—电力系统及自动化] O327[理学—一般力学与力学基础]