弹性支撑输电线自振频率分析  

Research on Natural Vibration Frequency of Transmission Line with Elastic Support

作　　者：马傲玲[1] 陈自力[2] 

机构地区：[1]厦门理工学院现代工程训练中心,福建厦门361024 [2]厦门理工学院土木工程与建筑学院,福建厦门361024

出　　处：《厦门理工学院学报》2015年第3期57-62,共6页Journal of Xiamen University of Technology

基　　金：国家自然科学基金项目(51108047);福建省自然科学基金项目(2012J01239;2011J01024);福建省教育厅自然科学和技术研究项目(JK2011046);福建省中青年教师教育科研项目(JB13159);厦门理工学院教学改革与建设项目(JGY201347)

摘　　要：考虑弹性支撑边界条件的影响,通过理论分析、数值模拟和实验对比,研究输电线面内和面外振动自振频率,建立其弹性支撑动力学公式.结果发现:端部约束刚度对输电线自振频率有一定影响,当端部的弹性刚度很大时,二者分析结果相近,而当端部弹性刚度很小时,二者分析结果相差甚远;面内振动时刚度较大,传统计算理论与弹性支撑理论结果相近,面外振动时一定跨度条件下两种理论结果有差异;随着输电线跨度的减小,支撑的弹性影响增大.In this paper, the effects of elastic support boundary conditions were considered through theoretical analysis, numerical simulation and experiment, and comparative studies were conducted on the in- plane and out-plane natural frequency, and the elastic support dynamics formula was established. It was found that： the end restraint stiffness caused some impact on the natural frequency of transmission line, when the elastic stiffness of the end is very large, the results of the two analysis are similar, when the elastic stiffness of the end is very small, the difference between the two results is very obvious; traditional calculation and elastic support theory results are closed with lager stiffness of in-plane vibration, but not the out-plane vibration with a certain span; the effect of elastic support is increased with the transmission lines span decreasing.

关 键 词：弹性支撑 输电线 自振频率 面内振动 面外振动 

分 类 号：TM75[电气工程—电力系统及自动化]