大跨度输电线的脉动风荷载模拟  

Stimulation on Impulsive Wind Load of Large Span Power Transmission Line

作　　者：吕利民 陈波[2] 谢文平 李鹏云 

机构地区：[1]广东电研锅炉压力容器检验中心有限公司,广东广州510080 [2]道路桥梁与结构工程湖北省重点实验室(武汉理工大学),湖北武汉430070 [3]广东电网有限责任公司电力科学研究院,广东广州510080 [4]广东电网有限责任公司,广东广州510080

出　　处：《广东电力》2015年第8期106-109,共4页Guangdong Electric Power

基　　金：中国南方电网有限责任公司科技项目(K-GD2013-0783);霍英东教育基金会资助项目(131072);湖北省杰出青年基金资助项目(2014CFA026)

摘　　要：以湛江地区某大跨度输电塔线体系为实际工程背景,研究大跨度输电线的脉动风荷载模拟问题。基于随机振动理论的输电线多维脉动风荷载模拟方法和脉动风荷载模型,采用有限元方法建立了该塔线体系的导线分模型,并考察其振动基频和振型。模拟结果表明:随着输电线节点竖向高度的增大,其脉动风速迅速增加;某一输电线的跨中节点脉动风速明显小于两端节点的脉动风速。Taking some large span power transmission tower line system in Zhanjiang area as a practical engineering back-ground,stimulation on impulsive wind load of large span power transmission line was studied.By means of stimulation meth-od for multi-dimensional impulsive wind load of power transmission line and impulsive wind load model based on random vi-bration theory,branch model of conductor of this tower line system was established by using finite element method,its vi-bration fundamental frequency and vibration mode was investigated.Stimulation result indicates that with increase of verti-cal height of nodes of the power transmission line,its impulsive wind speed rapidly increased and impulsive wind speed of midspan node of the power transmission line was obviously lower than that of nodes of both ends.

关 键 词：输电线 脉动风荷载 随机过程 功率谱 

分 类 号：TM751[电气工程—电力系统及自动化] O346.5[理学—固体力学]