【摘要】 本文研究了MTMD对建筑结构多模态减震控制。将主结构简化为多自由度模型,MTMD对结构的反力与地震荷载共同作为结构的荷载输入进行分析;基于主结构多模态耦合进行推导分析,阐述了MTMD与结构之间的相互作用关系,提出MTMD的复惯性质量。提出MTMD的控制类型是加速度相关型的无源被动控制。从频域传递函数,白噪声、宽带和窄带地震激励下的结构相对位移和绝对加速度谱密度,以及El-centro地震波作用下结构的地震响应三个方面,分析了MTMD对顶部带有结构附属物的结构的控制效果。并且给出TMD的控制效果加以比较验证。算例说明MTMD多模态控制对结构的相对位移和绝对加速度均有较好的控制效果,并且优于TMD控制效果。更多还原

【Abstract】 In this paper, control of the seismic response of multistory structures with MTMD are investigated. The multistory structures are simplified as MDOF system. Based on modes of the primary structure, the interaction between MTMD and primary structure is studied, and complex inertia mass is presented which explains clearly and briefly the action mechanism between MTMD and structure. The control of MTMD for the primary structure is accelerationdependent passive control. They are illustrated with the transfer function in the frequency domain, both the displacement and acceleration response power spectral densities in white impulse, narrow band and broad band excitation, and time history analyses. In the control of multistory structures with MTMD, the control effect of the responses of both displacement and acceleration of structure is good, and multimode control is superior to singlemode control of TMD. For analysis precision, considering modes coupling is superior to not considering modes coupling. For shearing model, analysis results with uncoupling are satisfied for engineering demand. 更多还原