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对设置MR-TMD系统的跨线人行天桥在正线列车从其下方高速通过时的振动响应的抑制方法进行了研究。建立了设置TMD或MR-TMD系统的跨线人行天桥在列车风与列车引起的非一致激励环境振动共同作用下的智能控制方法,并以某跨线人行天桥为工程背景,根据不同类型的控制装置和控制算法对该跨线天桥在正线列车通过时的振动响应控制进行了研究,同时将仅采用TMD系统、采用MR-TMD系统的开关控制算法和采用MR-TMD系统的固定增量控制算法的控制效果进行对比分析。研究结果表明:采用MR-TMD系统的跨线天桥对于抑制由于高速列车通过时的振动响应非常有效,相应的舒适度也能得到极大改善,同时,采用MR-TMD系统的固定增量控制算法对跨线天桥的抑制效果明显优于其他类型的控制方法。
The method of suppressing the vibration response of a cross-over pedestrian bridge with MR-TMD system in high-speed passing of a line train from below is studied. An intelligent control method of cross-pedestrian bridge with TMD or MR-TMD system is set up under the action of train wind and train-induced non-uniform excitation environment vibration. Taking a cross-over pedestrian bridge as the engineering background and according to different types of control Device and control algorithm are used to study the vibration response control of the overpass when it passes through a line. At the same time, only the TMD system, the switch control algorithm of MR-TMD system and the fixed incremental control using MR-TMD system The control effect of the algorithm is compared and analyzed. The results show that overpass flybridge with MR-TMD system is very effective in suppressing the vibration response due to high-speed train passing, and the corresponding comfort can be greatly improved. At the same time, the MR-TMD fixed incremental control algorithm The suppression effect of overpass is obviously better than other types of control methods.