巨型框架悬挂减振结构的参数分析

Characteristic analysis of mega-frame suspended vibration reduction structures

基于有限元软件ABAQUS分析了巨型框架悬挂减振结构中阻尼器的阻尼系数和刚度系数的变化对结构地震响应的影响,给出了参数分析的目标函数和约束条件,结果表明:在最优的阻尼器的阻尼系数使综合减振系数最大,此时悬挂楼层的位移角也能得到有效控制,且可以通过增加刚度系数来减小层间位移角;存在最优的刚度系数使综合减振系数最大,而此时悬挂楼层层间位移角可能不满足要求,这可以通过增加阻尼系数来保证。

Based on finite element software ABAQUS,the paper analyzes the influence of changing damping coefficient and stiffness coefficient of dampers installed in mega-frame suspended vibration reduction structures on seismic response. The objective function of character analysis and constraint condition was proposed. On one hand,the results show that,there is optimum damping coefficient which can make the integrated vi-bration reduction coefficient get the maximum value,and the inter-story drift ratio of the suspended floors can be controlled effectively,and the inter-story drift ratio can be induced by increasing stiffness coefficient. On the other hand,there is optimum stiffness coefficient which can also make the integrated vibration reduction coefficient get the maximum value,but the inter-story drift ratio may not be meet the requests,and it can be ensured by increasing damping coefficient.