SMA阻尼器-斜拉索系统减振控制试验  

Experiments of Vibration Control of SMA Damper-stayed Cable System

作　　者：左晓宝[1] 李爱群[2] 孙香花[1] 

机构地区：[1]南京理工大学理学院,江苏南京210094 [2]东南大学土木工程学院,江苏南京210096

出　　处：《南京理工大学学报》2008年第6期666-671,共6页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金重点项目(50038010);江苏省自然科学基金(BK2007212)

摘　　要：为了抑制斜拉桥拉索在风、雨等外界环境激励下的振动反应,设计了一种形状记忆合金(SMA)阻尼器并安装在斜拉索上。给出了该阻尼器的结构和分析模型,以及SMA阻尼器-斜拉索系统的振动方程。以润扬大桥斜拉桥的1∶60缩尺模型为试验平台,进行了SMA阻尼器-斜拉索-桥面系统的减振试验,研究了SMA阻尼器对模型索在自由振动和桥面振动激励下减振效果的影响。试验结果表明:在斜拉索的面内安装SMA阻尼器,使斜拉索面内自由振动的衰减时间减少了50%,降低桥面振动所诱发的斜拉索面内耦合振动的峰值达39%以上,具有明显抑制斜拉索振动反应的作用。In order to control vibration of cable in cable-stayed bridge under external excitation such as wind and rain, a shape memory alloy （SMA） damper is designed and installed on the stayed cable. The structure and analytical model of the damper, and the vibration equation of a SMA damperstayed cable system are presented. Taking 1 ： 60 model of the Runyang cable-stayed bridge （ in Jiangsu, China） as a test platform, the experiments on vibration control of the system made up of SMA damper, stayed cable and bridge deck are carried out to investigate the effects of SMA damper on the model-cable＇ s vibration control under free vibration and excitation induced by the deck free vibration. Experimental results show that the SMA damper installed in plane of the cable can decrease 50% of the free vibration decay time of the cable in plane, and reduce above 39% of the cable inplane coupling vibration response peaks induced by the deck vibration. The SMA damper can effectively control the vibration of the cable.

关 键 词：形状记忆合金 阻尼器 斜拉索 减振控制 

分 类 号：O328[理学—一般力学与力学基础] TU311.3[理学—力学]