高压输电塔风振控制的能量特性  

Energy property of the controlled-vibration produced by wind in transmission tower-line systems

作　　者：陈波[1] 郑瑾[2] 瞿伟廉[1] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点实验室 [2]武汉理工大学设计研究院,湖北武汉430070

出　　处：《华中科技大学学报（自然科学版）》2009年第2期121-124,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50708083);贵州省教育厅重点资助项目(黔教科2008044)

摘　　要：研究了输电塔线体系风振控制的能量评估问题.采用多自由度模型建立了输电塔线体系动力分析模型和磁流变(MR)阻尼器的力学模型,研究了安装有MR阻尼器的塔线耦联体系的动力分析模型和受控运动方程,并采用局域反馈的固定增量半主动控制策略来实现输电塔结构风振反应的半主动控制.提出了设置有MR阻尼器的输电塔结构风振反应的能量评价标准并将其应用于某大跨越输电塔线体系的风振控制.分析表明:MR阻尼器可以有效地抑制输电塔结构的风振反应,通过能量评定方法可以准确地考察不同控制方法的控制效果.The evaluation on energy characteristics of wind-excited transmission tower-line system under vibration control is actively carried out in this study. The multi-degree-of-freedom model of transmission tower-line system is developed and the mechanical model of magnetorheological （MR） damper is then introduced. The dynamic model and analytical method of transmission tower-line system incorporated with MR dampers are proposed. The semi-active control strategy based on fixed increment of controllable damper force is proposed for MR damper. The evaluation criteria of energy responses is developed and applied to the wind response mitigation of a transmission tower-line system by using MR dampers. The observations from numerical investigation indicate that the wind-induced vibration of transmission tower-line system can be substantially suppressed and the proposed energy evaluation criteria can be effectively utilized in the examination on control performance.

关 键 词：输电塔线体系 磁流变阻尼器 风振反应 能量反应 响应控制 

分 类 号：TU311.3[建筑科学—结构工程]