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提出了一种利用主 -从结构间的相互作用来减少在地震作用下结构响应的控制方法。该方法通过优化设计主 -从结构间的被动耗能单元 ,最大限度地耗散结构的相对振动能量以减小主、从结构的整体振动水平 ,或最大限度地吸收主结构的相对振动能量以减小主结构的振动。文章首先导出了在平稳白噪声激励下被动耗能单元优化刚度和优化阻尼的一般表达式 ,并分析了不同结构参数对控制效果的影响 ;比较了在不同的平稳过滤白噪声激励下主 -从结构相对位移反应的均方根值 ;最后给出了在EI- Centro1 940 NS地震波作用下主 -从结构相对位移和绝对加速度反应的峰值。数值结果表明了这种被动优化控制方法的有效性
A control method is proposed to reduce the structural response under the earthquake by using the interaction between the master and the slave structure. The method optimizes the design of the passive energy-consuming unit between the main and the passive components to minimize the relative vibrational energy of the structure so as to reduce the overall vibration level of the primary and secondary structures or to absorb the relative vibration energy of the primary structure as much as possible Reduce the vibration of the main structure. The paper first derives the general expressions of the optimized stiffness and the optimal damping of the passive energy dissipation unit under the stationary white noise excitation and analyzes the influence of different structural parameters on the control effect. Finally, the peak values of the relative displacement and absolute acceleration of the main-sub structure under EI-Centro1 940 NS seismic wave are given. The numerical results show the effectiveness of this passive optimization control method