磁流变式调谐液柱阻尼器抑制结构地震作用半主动控制  

Magnetorheological tuned liquid column damper (MR-TLCD) for semi-active control of structures under earthquake

作　　者：孙洪鑫[1] 王修勇[1] 陈政清[2] 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《地震工程与工程振动》2010年第5期22-28,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50578063)

摘　　要：磁流变式调谐液柱阻尼器(MR-TLCD)是由调谐液柱阻尼器(TLCD)和磁流变液阻尼器(MRD)组成的新型半主动控制装置。依据Lagrange方程建立了MR-TLCD与单自由结构耦合运动方程,基于线性二次型经典控制计算出最优主动控制力,采用Bang-Bang、离复位以及限界Hrovat最优控制三种算法来实现半主动控制策略,以Northridge地震动为例在Matlab/Simulink模块下进行了仿真计算。结果表明三种半主动控制策略中离复位控制最优,限界Harvot,Bang-Bang次之,且都优于被动控制效果。相对位移控制效果好于相对加速度,均方根值效果好于峰值效果。但MR-TLCD抑制结构受到此类特征周期地震作用时有放大加速度峰值可能。Magnetorheological tuned liquid column damper（MR-TLCD） is a promising device for vibration control,which consists of tuned liquid column damper（TLCD） and magnetorheological damper（MRD）.The equations of motion for the coupled system MR-TLCD-structure are formulated by Lagrange equations in this paper.Based on the linear quadratic regulator（LQR） algorithm,the active control force of the coupled system is calculated.Three semi-active strategies that include Bang-Bang,off-and-towards-equilibrium and clipped Harvot optimal are simulated using Matlab/Simulink blocks under Northridge seismic ground motion.The results of calculation show that the effect of off-and-towards-equilibrium is more significant than that of clipped Harvot optimal and Bang-Bang,which are superior to seismic mitigation effect of passive control.The control performance of the relative displacement and the root mean square is more significant than that of relative acceleration and the peak value.It is possible to enlarge the acceleration peak under exampled characteristic period seismic ground motion with MR-TLCD shock absorber.

关 键 词：磁流变式调谐液柱阻尼器 动力方程 半主动控制 地震控制 减震效果指标 

分 类 号：P315.966[天文地球—地震学] TU311.3[天文地球—固体地球物理学]