【摘要】 本文采用半主动控制方法对非对称结构在地震作用下的平动-扭转耦合振动控制进行了研究。首先建立了非对称结构的平动-扭转耦合振动方程和状态空间方程;然后以磁流变(MR)阻尼器为控制装置,结合线性二次型最优控制、最优控制算法和限幅控制策略,提出了基于MR阻尼器的半主动控制方法;最后对半主动控制方法对非对称结构地震反应的控制效果进行了计算分析。结果表明,半主动控制方法可以对非对称结构的水平位移、扭转位移和加速度反应都产生明显的控制效果,适当下调控制力需求时,不会导致控制效果的等比下降,降低MR阻尼器可调控制力上限后,可以减小阻尼器尺寸,便于其在工程实际中的应用。更多还原

【Abstract】 In this paper, we studied the control effect of irregular structures with translation-torsion coupling response under earthquake loading by using semi-active control method. Firstly, we established the translation-torsion coupling response equations and state space equation. Then, we proposed the semi-active control method based on magnetorheological(MR) damper being control device, combining with the linear quadratic optimal control algorithm and limiting control strategy. Finally, we calculated and analyzed the effect of the semi-active control method of irregular structures with seismic response. The results show that with the semi-active control method, the control effect of the irregular structures’ horizontal displacement and torsional displacement and acceleration response are obvious. Appropriate control demand reduction will not lead to geometric decline in control effect. And lowering adjustable control limit of MR damper can reduce the size of the damper, supporting its application in engineering practice.更多还原