为了有效地减小重要设备在地震荷载作用下的动力反应,提出了使用磁流变阻尼器进行半主动控制。首先分析了减震器的本构模型,建立了主体结构的动力方程,以设备的相对位移和相对加速度作为控制变量,提出了相应的半主动跟踪控制算法。数值分析表明,安装磁流变阻尼器的设备的加速度和相对位移显著减小,因而能保证重要设备的正常使用。
In order to reduce the dynamic response of indoor important equipment to seismic excitation, semi-active control using megnetorheological(MR) damper was presented. At first, the constitutive model of the damper was analyzed and the dynamic equation of the primary structure was formulated. Taking relative displacement and acceleration of the equipment as the controlling variables, corresponding tracing control algorithm was given. Numerical results show that the acceleration and relative displacement of equipment mounted with MR damper are decreased considerably, therefore, the MR damper is an effective seismic control device.