随机地震动作用下的结构振动控制试验设计

Experimental design of structural vibration control subject to random earthquake ground motions

研究了随机地震动作用下基于MR阻尼器的结构振动控制振动台试验设计的若干问题。首先,由原型结构按动力相似关系进行了模型结构的设计,基于ANSYS模态分析的结果识别出了其结构参数;其次,基于物理随机地震动模型生成了试验地震动样本,根据试验要求调整了各地震动样本的加速度峰值;然后,基于MATLAB对试验模型进行了随机地震动作用下无控与主动控制数值仿真分析;最后,结合ANSYS弹塑性动力时程分析,研究了试验模型的动力稳定性。介绍的振动控制试验设计方法可供进行类似试验设计的研究人员参考。

Some problems in experimental design of MR damper-based structural vibration control subject to random earthquake ground motions were investigated.First of all,the design of test model was conducted based on prototype structure according to dynamic similarity law,and structure parameters of the test model were identified based on results of model analysis using ANSYS;Secondly,ground motion time histories were generated according to the stochastic ground motion model,and peak values of accelerations of the ground motions are adjusted;Then,numerical simulation analysis of the test model without control and with active control subject to random ground motions was carried out with MATLAB;Finally,dynamic stability of the test model was considered through ANSYS elastoplastic transient dynamic analysis.The design method of vibration control tests presented in this paper could be taken as reference to researchers.