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在建立漂浮型铁路斜拉桥主梁纵向列车制动响应模态受控方程的基础上,同时考虑到大型桥梁结构参数的不确定性会直接影响到主动控制效果的稳定,推导出当桥梁结构模型频率发生变化时桥梁结构的鲁棒控制方程,并以天兴洲公路铁路两用斜拉桥为工程背景,对其主梁纵向列车制动响应的鲁棒控制进行了仿真分析,结果表明:对于具有不确定参数的桥梁结构,采用鲁棒控制方式抑制主梁纵向列车制动振动响应的效果明显优于主动控制方式.
On the basis of establishing the controlled equations of the longitudinal train braking response of the main girder of the floating railway cable-stayed bridge, taking into account the uncertainty of the structural parameters of the large-scale bridges will directly affect the stability of the active control effect and deduce that when the bridge structure The robust control equations of the bridge structure with the change of the model frequency are taken and the robust control of the longitudinal train braking response of the main girder is simulated with the dual-purpose cable-stayed bridge of Tianxingzhou Highway and Railroad as an example. The results show that: For the bridge structure with uncertain parameters, the effect of restraining the vibration response of the longitudinal train brake of the main girder by using the robust control method is obviously better than that of the active control mode.