巨型框架减振结构体系风振主动控制研究

Study on the active control of mega-sub frame controlled structure subjected to wind loads

巨型框架减振结构是结合结构控制理论和一般巨型框架结构的特点形成的新型结构体系。根据其特点,基于线性二次型(LQR)经典最优控制理论,提出巨型框架减振结构的主动控制策略。并且结合工程实例,从能量的角度给定权矩阵的具体形式,主要讨论了在脉动风荷载作用下,权待定参数λ的变化对主结构顶层位移响应和最上部子结构顶层加速度响应的控制效果以及作动器最大控制力的影响。最后综合考虑各个方面给出λ值的确定方法。

The mega-sub frame controlled structure combined structure control theory with the characteristic of conventional mega-sub frame structure is a new structural system. According to its structure configuration characteristic,the active control strategy of mega-sub controlled frame structure based on the LQR optimal control theory is put forward. It mainly discusses the weighting parameter to be confirmed how to influence the control effect of the displacement response at the top megamass and the acceleration response at the top submass, at the same time how to influence the maximal control force of actuators subjected to stochastic wind loads through a project example when the concrete form of weighting matrix is fixed in terms of energy. At last,the optimal λ after taking into account each side synthetically is proposed.