强风作用输电塔结构动态载荷识别技术  

Wind Load Identification Technology of Transmission Tower

作　　者：祝贺[1] 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012

出　　处：《浙江电力》2010年第1期1-3,12,共4页Zhejiang Electric Power

基　　金：中国电机工程学会电力青年科技创新项目(2008-16);吉林省教育厅"十一五"重点科研项目(2007-51)

摘　　要：输电塔作为重要的输电线路构架,近年来频繁受到强风载荷作用。鉴于强风载荷测量的难度,因而根据模态分析理论实测输电塔的振动动力特性,根据测得的结构加速度时程反推出结构的速度时程和位移时程,进而推出作用在结构上的强风载荷时程,最后利用大型有限元软件ANSYS建立输电塔三维模型,将反推出的强风载荷时程进行加载,对结构进行时程分析,得到风载荷强度变化时程和能量耗散时程变化关系,可为输电塔抗强风动力特性分析提供参考,对深入了解输电塔结构强风作用下的动力响应具有指导意义。Transmission tower as an important lifeline structure, which are affected by strong winds in recent years. In view of the difficulty of measuring the load, according the modal analysis theory in this paper, using the measured vibration transmission tower dynamic characteristics data, the wind speed time-history and displacement time-history can he derived by measured acceleration data. Finally, by using of finite element software ANSYS, the three-dimensional model of transmission tower was established, the wind load strength and energy dissipation time-change relations will be obtained by time-history analysis in ANSYS. The method in this paper can be reference for dynamic characteristics analysis of transmission tower, which is very important for understand the dynamic response of transmission tower deeply.

关 键 词：强风 输电塔 动态载荷 识别 

分 类 号：TM753[电气工程—电力系统及自动化]