大跨越输电塔-线体系风振控制研究  

THE RESEARCH ON WIND-INDUCED VIBRATION CONTROL FOR BIG-SPAN ELECTRICAL TRANSMISSION TOWER-LINE SYSTEM

作　　者：李黎[1,2] 尹鹏[1,2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]华中科技大学控制结构湖北省重点实验室,湖北武汉430074

出　　处：《工程力学》2008年第A02期213-229,共17页Engineering Mechanics

基　　金：国家电网公司科技项目([2007]413)

摘　　要：大跨越输电塔是一种高耸柔性结构,对动荷载,尤其是风荷载比较敏感,易产生较大的动力响应。对大跨越输电塔进行振动控制研究已成为电力工程与土木工程界的一个重要研究课题,既有其重要的理论意义,又有其重要的经济价值。该文以我国"十一五"期间的重大工程之一,特高压项目晋东南-南阳-荆门1000kV汉江大跨越输电线路工程为研究背景。介绍了橡胶铅芯阻尼器在输电塔-线体系风振控制中的应用;风速场的数值模拟;不同风向角动风作用下的风振控制效果研究。并通过对钢管的轴向变形、纯刚度的影响、静风荷载的响应和输电塔可靠度的研究,验证了阻尼器的控制效果。通过对五种风向角动风作用下塔身位移、主材内力的分析计算表明:所设计的控制方案在不同风向角作用下都能达到很好的减振效果,为将来类似的工程应用提供了参考。Big-span power transmission tower is a high flexible structure. It is sensitive to dynamic load, especially to wind, which would cause significant dynamic response. Theoretically and economically, it is an important research issue for both power engineering and civil engineering to control the vibration of the big-span power transmission tower. This paper focuses on the behavior of Jingdongnan-Nanyang -Jingmen 1000kV transmission tower line across the Hanjiang river, which is one of the Eleventh-five National Key engineering project. The paper introduces the application of the lead viscoelastic damper （LVD） in controlling wind-induced vibration of big-span transmission towers, the wind field simulation technique and the effects of wind-induced vibration control under different wind directions. The effects of wind-induced vibration control are verified through examining LVD deformation, the contribution of stiffness, the response under simplified wind load and the reliability of the transmission tower. From the displacement and internal force of the main material under five different wind directions, the efficiency of the controlling scheme is also demonstrated, it would provide more experience for the engineering application in the future.

关 键 词：输电塔 橡胶铅芯阻尼器 风向角 风振控制 减振效果 

分 类 号：TU311.3[建筑科学—结构工程] TM753[电气工程—电力系统及自动化]