半主动控制装置在受控结构中的优化布置

Optimal Placement of Semi-active Control Devices for Controlled Structure

利用阻尼器进行振动控制的方法可以有效减小结构体系在地震作用下的振动反应,这种振动控制的效果不仅取决于阻尼器出力大小和控制算法的优化,也取决于阻尼器在高层结构中的布置位置。目前,对于阻尼器的位置优化的研究大多局限于被动控制,而对于主动及半主动控制装置研究则较少。本文提出了一种基于改进遗传算法和等效二次型性能指标的阻尼器位置优化方法,并应用到磁流变液阻尼器半主动控制系统中。最后,通过一8层剪切框架算例验证了本文提出的阻尼器的优化布置方法是简单准确而有效的。

The structural vibration control using dampers can reduce the responses of the structures induced by ground motion effectively. However, the effectiveness depends not only on capacity of damper and related control algorithm, but also on optimal placement of the dampers. Presently, researches on the placement optimization are mainly on the passive control, but are rare on the active and semi-active control devices. In this paper, the authors present an optimal method based on improved genetic algorithm and equivalent quadratic performance index, and it is applied to semi-active control system based on magnetoreological fluid damper. An example study shows that the present method is simple and effective.