设置MR-TMD系统的跨线天桥在正线列车下的振动控制研究  

Research for Control of Vibration Responses of Cross Line Footbridge Installed MR-TMD System Under Excitation Caused by Main Line Train

作　　者：刘嘉[1] 张弦[2] 蒋丽[3] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点实验室,武汉430070 [2]武汉理工大学土木工程与建筑学院,武汉430070 [3]湖北经济学院物流与工程管理学院,武汉430205

出　　处：《武汉理工大学学报》2015年第11期67-71,77,共6页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51108363);湖北省自然科学基金(2014CFB849)

摘　　要：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。Suppressing method of vibration response of cross line footbridge set with MR TMD system was researched when high-speed main Line train passed by. Firstly,intelligent control method of cross line footbridge which sets TMD or MR-TMD under joint action of train wind and non-uniform environmental vibration caused by train wind was established. Then, with the engineering background of a cross line footbridge, according to the different types of control algorithm, con trol of vibration responses of this footbridge was researched,which caused of main Line train passing by. Finally,the con- trol effects by switching control algorithm which only used TMD system and MR-TMD system,and by fixed incremental control algorithm which used MR-TMD system, were compared. Simulation results show that cross line footbridge that used fixed incremental of MR-TMD system is very effective to suppress the vibration responses caused by high-speed train, and corresponding degree of comfort can be greatly improved. Meanwhile, the suppressing effects on cross line foot- bridge by fixed incremental algorithm of MR-TMD system are apparently superior to those of by other types of control methods.

关 键 词：正线列车 跨线天桥 振动控制 非一致激励 

分 类 号：U448.11[建筑科学—桥梁与隧道工程]