大跨度斜拉桥颤振主动控制研究

对受气动荷载作用的大跨度斜拉桥进行分析，对安装主动质量阻尼器（ＡＭＤ）的斜拉桥建立了全桥的三维运动方程，采用实模态对运动方程进行降阶，并根据最优控制理论，对ＡＭＤ用于大跨度斜拉桥的颤振实施主动控制进行了理论研究，推导了ＡＭＤ用于控制斜拉桥颤振的理论公式，并编写了相应的计算程序。最后，以一座斜拉桥为例，分析了ＡＭＤ对颤振的主动控制效果。

Study on the Active Control of Flutter of Long Span Cable Stayed Bridge

The 3 D motion equations of long span cable stayed bridge equipped with active mass dampers (AMD) are established based on the analysis of the bridge under wind loads. The orders of equations are reduced by the real modes. According to the optimal control theory, the control method of flutter of cable stayed bridge using AMD is theorectioally studied in this paper; the calculation formula and the computer program are set up too. As an example, a cable stayed bridge is calculated for demonstrating the effectiveness of AMD.