PTRMD在多自由度结构中的减振性能及鲁棒性  

Vibration Damping Performance and Robustness of PTRMD in Multi-degree Freedom Structure

作　　者：李书进[1] 杜政康 孔凡[1] 沈少波[1] LI Shu-jin;DU Zheng-kang;KONG Fan;SHEN Shao-bo(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,Hubei,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《建筑科学与工程学报》2019年第1期41-47,共7页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(51678464)

摘　　要：将一种带碰撞的滚动型调谐质量阻尼器(PTRMD)应用于多自由度结构中,对其在多自由度结构体系中的减振性能及阻尼器频率失谐时的鲁棒性进行研究。通过拉格朗日方程推导得到分段运动方程,然后推广到多自由度结构中,建立了设有该装置的多自由度受控系统的动力方程,并利用数值方法求解。把PTRMD安装到6层结构中,对其在自由振动和强迫振动时的控制效果进行探讨,并与无碰撞的滚动型调谐质量阻尼器(TRMD)进行了比较,同时对它们在阻尼器频率偏离最优频率时的鲁棒性进行了分析。结果表明:在多自由度结构中安装PTRMD能有效减小结构的动力反应,得到满意的减振效果;相比TRMD,PTRMD具有减振性能好、控制频带宽、适用性强、受阻尼器频率变化的影响不大等优点,具有更广大的应用前景。A new pounding tuned rotary mass damper(PTRMD)was introduced for vibration control of multiple-degree freedom structure.The damping performance of PTRMD in multidegree freedom structure system and the robustness of the damper in frequency detuning were studied.The piecewise motion equation was derived from the Lagrange equation,and then extended to the multi-degree freedom structure.The motion equations for the multi-degree freedom system controlled with PTRMD were established,and solved by numerical method.The control performances of an actual 6-story structure with PTRMD and tuned rotary mass damper(TRMD)were compared both in free vibration and forced vibration.At the same time,the robustness of damper when the frequency of damper deviates from the optimal frequency was analyzed.The results show that the PTRMD can effectively reduce the structural displacement response and get satisfactory vibration control performance.Compared with TRMD,PTRMD has many advantages,such as good damping performance, wide control bandwidth,strong applicability,little influence of damper frequency variation,and has a wider application prospect.

关 键 词：振动控制 带碰撞的滚动型调谐质量阻尼器 减振性能 鲁棒性 多自由度结构 

分 类 号：TU352[建筑科学—结构工程]