地震作用下MSCSS控制优化参数研究

通过利用复模态分析法定义巨子型结构体系MSCSS(Mega-sub Controlled Structure System)的动力放大系数DMF(Dynamic Magnification Factor)表达式,取激励接近结构基频频段内的动力放大系数为指标,反映了结构各部分参数设置(质量比、刚度比、附加阻尼比及附加柱刚度比)对结构调频减震机理的影响。并采用最大最小化准则选取结构的最优参数范围,该分析法适用于分析不同巨层MSCSS的参数设置。

On optimizing control parameters for suppressing vibration of MSCSS under earthquake excitation

Sections 1 and 2 of the full paper explain our application,Their core consists of:(1) Based on the complex modal theory,the expression of the dynamic magnification factor(DMF)about the mega-sub controlled structural system(MSCSS) was derived.We used the dynamic magnification factor(DMF)as structure dynamic response index.(2) According to the change of the DMF in the range of excitation frequency which was close to the structural natural frequency of vibration,it was concluded that different parameter settings (mass ratio,stiffness ratio,additional damping ratio,additional pillar stiffness ratio) about mega structure and sub structure had different influence on the control effectiveness of the MSCSS.The results,Fig.3 to Fig.11,and the analysis preliminarily indicate that the optimal parameter settings can indeed improve significantly the self-absorption of shock of MSCSS.This method is applicable to analysis parameter settings of MSCSS with different number of layers.