斜拉索-非线性滞回阻尼器系统的振动控制试验研究  

Experimental Study on Vibration Control of Non-Linear Hysteretic Isolator-Cable System

作　　者：陈勇[1] 徐意娟 孙炳楠[1] 楼文娟[1] 倪一清[3] 高赞明[3] 

机构地区：[1]浙江大学土木系,浙江杭州310027 [2]杭州博世电动工具有限公司,浙江杭州310012 [3]香港理工大学

出　　处：《系统工程理论与实践》2005年第7期67-74,共8页Systems Engineering-Theory & Practice

摘　　要：　采用非线性滞回阻尼器构造一个斜拉索-非线性阻尼器系统,并利用磁滞系统的耗能特性,抑制斜拉索的振动.按照1∶12的缩尺比,在试验室中建立了一条原型为143m长斜拉索的试验模型,首先对没有阻尼器的斜拉索进行了振动控制试验研究,然后将非线性滞回阻尼器安装在靠近张拉端的附近,在另一端施加激励,对在不同阻尼器位置及不同激振力幅值下的斜拉索的动力响应进行试验研究,得到了对振动控制设计有较高应用价值的传递函数和等效阻尼比.A non-linear hysteretic isolator-cable system is set up to suppress the cable vibration, according to the energy dissipation characteristics of hysteretic system. A 12m-long stay cable specimen, which is a 1 ： 12 scale model of a 143m-long prototype cable in an actual cable structure, is established for the experimental study. Firstly, the modal testing on the pure cable without damper is performed to identify the actual modal properties of the cable. Then a series of dynamic tests are conducted on the cable incorporated with a small-size non-linear hysteretic isolator near the lower anchorage. By exciting the cable transversely at a point near the upper anchorage, the nonlinear frequency response curves of the cable-damper system under different excitation force amplitudes and three installation positions of the damper are obtained experimentally. The resonant frequencies and the equivalent viscous damping ratios of the nonlinear system under different excitation levels are also identified, which are useful for the cable vibration control。

关 键 词：斜拉索 非线性滞回阻尼器 振动控制 等效阻尼比 

分 类 号：TB114.2[理学—运筹学与控制论] N945.14[理学—概率论与数理统计]