基于脉动实测的输电塔风振响应简化分析  

The Simplified Simulation of Along-Wind Response of Transmission Tower Based on Ambient Excitation Testing

作　　者：刘慧群[1] 何敏娟[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《特种结构》2011年第5期22-25,共4页Special Structures

基　　金：国家自然科学基金重点项目(50638010)

摘　　要：风荷载对输电塔起着控制作用。本文以800kV特高压输电塔为研究对象,通过环境脉动实测研究单塔顺风向风振响应。采用风速仪、SVSA软件同步测得塔顶风速及塔身各高度处加速度。根据实测结果采用MATLAB软件拟合结构一阶广义荷载谱,并基于等效静风荷载法简化分析顺风向风振响应。结果发现,拟合所得一阶广义荷载谱公式精度较高,简化分析方法与理论分析结果较为接近,能够满足工程需要。The wind load is the main lateral load of the transmission tower.In this paper,a 800kV ultra high voltage transmission line was studied.The ambient excitation testing and the frequency-domain method were used to study the along-wind response of the tower.The wind speed on the top of the tower was measured by the anemometer DT- 80,while the acceleration values of the structure were measured by the acceleration sensors simultaneously.SVSA was used to collect the acceleration values,which also could be used to analyze the data.The software MATLAB was available to deduce the fundamental mode generalized force spectrum（FMGFS ）.The wind load of the structure could be simplified by the FMGFS and the response was simulated by ANSYS.It was concluded the FMGFS and the simplified method had a high precise which could meet the project requirement.

关 键 词：格构式输电塔 顺风向响应 环境脉动实测 一阶广义荷载谱 等效静风荷载法 

分 类 号：TU347[建筑科学—结构工程] TU311.3