中低速磁浮简支箱梁车桥耦合动力响应  

Vehicle-Bridge Dynamic Responses of Medium-to-low Speed Maglev Simply Supported Box Beam

作　　者：郑晓龙[1] 杨吉忠[1] 徐昕宇 杨国静[1] 宋晓东[1] 陈星宇 ZHENG Xiaolong;YANG Jizhong;XU Xinyu;YANG Guojing;SONG Xiaodong;CHEN Xingyu(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道标准设计》2022年第7期79-83,共5页Railway Standard Design

基　　金：中铁二院工程集团有限责任公司科研项目(KSNQ202038)。

摘　　要：为探究较低车速情况下磁浮列车和简支梁桥的车桥耦合振动情况,以国内某中低速磁浮轨道交通试验线工程的20 m跨度简支箱梁为工程背景,采用动力仿真分析软件Midas和UM,建立考虑磁浮控制系统的磁浮列车-桥梁系统仿真分析模型,针对3节编组的磁浮列车以10~80 km/h速度通过简支箱梁的过程,开展磁浮列车与简支箱梁的耦合振动分析,对磁浮列车和桥梁的动力响应结果进行分析探讨。研究结果表明:随着车速提高,列车车体的最大位移和加速度响应值逐渐增大,但均在规范限值之内;悬浮架位移和加速度响应明显大于车体,空气弹簧系统有效衰减了悬浮架传递到车体的振动;梁体跨中挠度和加速度随着车速提高明显增大,均远小于规范限值。To investigate the vehicle-bridge coupling vibration of maglev train and simply supported girder bridge at low speeds, a simulation analysis model of maglev train-bridge system considering maglev control system is established by using dynamic simulation analysis software MIDAS and UM based on a domestic 20-meter span simply supported box girder of a medium-to-low speed maglev train transit test line project. Coupled vibration analysis between maglev train and simply supported box girder is carried out for the three-car maglev train passing through simple box girder at 10~80 km/h speed, and the dynamic response results of maglev train and bridge are analyzed. The results show that, as the speed increases, the maximum displacement and acceleration responses of the train body gradually increase, but both fall within the specification limits. The displacement and acceleration responses of the suspension frame are significantly larger than those of the car body, which indicates that the air spring system attenuates effectively the vibration transmitted from the suspension frame to the train body. The deflection and acceleration of girder in mid-span increase significantly with the increase of vehicle speed and are far less than the specification limits.

关 键 词：中低速磁浮 简支箱梁 动力仿真 车桥耦合 响应分析 

分 类 号：U237[交通运输工程—道路与铁道工程] U441.3[建筑科学—桥梁与隧道工程]