新型连体结构控制体系的减震性能研究

Research on the damping performance of a novel control system of the connected structure

针对刚性连体结构的振动控制改善问题,提出一种新型连体结构控制体系,推导该体系的振动微分方程及随机响应的拓展状态方程,并通过对减震层位置及减震参数的研究,证实了新型连体控制体系的良好减震性能。分析表明:新型连体结构控制体系的两自由度简化模型所得最优参数偏大,建议采用多自由度模型优化值;减震层刚度在较大的分布范围内对减震效果影响显著,但数值过大对结构减震不利,而减震层阻尼参数对改善减震性能贡献也较大,且存在最优值;减震层位置对结构的响应抑制影响显著,当设置在低层时效果更佳;为防止层间位移过大,建议保留一定的减震层刚度值。

A novel control system of the connected structure was proposed to improve the problem of the vibration control of the rigid connected structure.The corresponding differential equation of vibration and the extended state equation of random response for the system were derived,and the position of the damping layer and the corresponding parameters were investigated.Research has confirmed the good damping performance of the new control system.The analysis also shows that the optimal parameters obtained by the simplified two-degree-of-freedom model are too large,and it is recommended to use the optimized values of the multi-degree-of-freedom model;The stiffness parameters of the damping layer have a significantly impact on the damping effect in a large distribution range,but the excessive value is detrimental to the damping effects;The damping parameters of the damping layer also contributes a lot to the improvement of the damping performance,and there exists an optimal value;The position of the damping layer has a significant influence on the response suppression of the structure,and the effect is even greater when it is set at a lower story;It is suggested to retain a certain stiffness value of the damping layer to keep the drift in a rational range.