基于车桥耦合模型的高温超导磁浮车辆悬浮架结构对比分析  

Comparative analysis of suspension frame structure of HTS maglev vehicle based on vehicle bridge coupling models

作　　者：吉宇昂 池茂儒[1] 吴兴文[2] JI Yuang;CHI Maoru;WU Xingwen(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031 [2]西南交通大学机械工程学院,四川成都610031

出　　处：《铁道科学与工程学报》2023年第7期2431-2442,共12页Journal of Railway Science and Engineering

基　　金：国家自然科学基金区域联合基金资助项目(U21A20168)。

摘　　要：高温超导磁悬浮(High Temperature Superconducting,HTS)列车因其自悬浮导向自稳定特性被认为是未来超高速交通运输中较为理想的运行方式之一。作为高温超导磁悬浮列车最重要的部件之一,悬浮架的结构至关重要。因此有必要对不同方案的悬浮架结构建立车桥耦合模型,从运行平稳性、舒适度、振动传递率等方面对不同结构设计的悬浮架进行对比。研究结果表明:3种结构的悬浮架在动力学性能方面存在一定共性,双层悬浮架结构下车辆平稳性与舒适度指标更好,双层结构受空簧刚度影响最大。垂向减振器阻尼对3种结构的振动传递率影响均为阻尼越大,低频传递率越低,高频传递率越高。在车辆动态载荷作用下,桥梁跨中垂向位移的变化均为先略有上翘再下挠,而后呈现较大幅度的上翘与下挠,最后恢复正常。双层结构的悬浮架引起的桥梁跨中垂向加速度变化最为平顺。单层结构的悬浮架产生的跨中垂向加速度明显大于其余2种结构。桥梁的上挠随着车辆运行速度的增加呈现增大趋势,桥梁的下挠则是速度越大垂向位移越小。所得的结果是在特定的结构参数、负载条件下的仿真分析结果,可以为高温超导磁悬浮列车悬浮架结构的设计与选择提供一定的参考。Because of the self-levitation,self-guidance,and self-stability characteristics,high temperature superconducting(HTS)trains are regarded as one of the ideal operation modes in ultra-high speed transportation.The suspension frame’s structure is critical because it is one of the most important components of the hightemperature superconducting maglev train.The vehicle bridge coupling models of different suspension frame structures were established.They need to be compared in terms of running stability,comfort,vibration transmission rate,and so on.In terms of dynamic performance,the three structures had some similarities.The vehicle stability and comfort index are better under the double-layer structure.And this kind of structure was most affected by the stiffness of the air spring.The damping of vertical dampers had the following effect on the vibration transmissibility of the three structures,which were the greater the damping,the lower the low frequency transmissibility and the higher the high frequency transmissibility.The vertical displacement of the bridge's midspan fluctuates gradually when a vehicle dynamic load is applied,moving first upward and then downward before exhibiting a wide range of deflection,finally returning to normal.The change of vertical acceleration of the bridge’s midspan caused by the suspension frame of the double-layer structure is the smoothest.The structure of the single-layer frame produces an obviously greater mid-span vertical acceleration than the other two structures.The upward deflection of the bridge increases with the increase of vehicle’s running speed,while the downward deflection of the bridge tends to decrease.The results are all simulation analysis results under specific structural parameters and load conditions,which can provide some reference for the design and selection of the suspension frame structure of HTS maglev train.

关 键 词：高温超导磁浮 悬浮架 车桥耦合 结构对比 动力学性能 

分 类 号：U270.11[机械工程—车辆工程]