多层结构MTMD振动控制系统参数优化研究

Research on MTMD's parameters optimization of multi-story structures

采用振动控制算法中的线性二次型最优控制,研究了在地震作用下的结构控制作用系统参数优化设计,即假定控制器数量、位置,对控制作用参数进行优化。将选取的主结构简化为多自由度模型,将MTMD(多重调谐质量阻尼器)对结构的反力与地震荷载共同作为结构的荷载输入分析;基于对主结构多模态耦合作用的考虑以及MTMD加载位置的初步假定,以二次型性能指标对系统状态方程加以控制。得到控制效果与利用最优参数法的结构控制效果做进一步比较验证。最后利用ANSYS优化设计模块,对已得到的控制器参数进行二次优化。

In this paper the linear quadratic optimal control for algorithms of vibration structural control is used to research optimal design for structural control system under earthquake actions . The main structure is simplified as a multi-degree-of-freedoms（MDOF） system. Both the MTMD force and seismic action are inputted into a structure as a common structural toad. Based on the multi-modal coupling of main structure and the initially assumpting of the MTMD（Multi-Tuned Mass Damper） loading location, the system state equation is controlled by linear quadratic function index . The effectivity of the controllor is verified. Finally, by using the optimal design modules of ANSYS, the parameters of the passive controller design are optimized again