轨道不平顺激励对高温超导磁浮列车电机悬挂的影响  

Impact of track irregularities on the motor suspension of high-temperature superconducting maglev trains

作　　者：郑杰[1] 何沛恒 李强[1] 邓斌[1] 邓自刚[2] ZHENG Jie;HE Peiheng;LI Qiang;DENG Bin;DENG Zigang(Engineering Research Center of Advanced Drive Energy Saving Technologies,Ministry of Education,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)

机构地区：[1]西南交通大学先进驱动节能技术教育部工程研究中心,四川成都610031 [2]西南交通大学轨道交通运载系统全国重点实验室,四川成都610031

出　　处：《机车电传动》2024年第1期101-108,共8页Electric Drive for Locomotives

基　　金：西南交通大学学科交叉研究专项(2682021ZTPY109)。

摘　　要：高温超导磁浮列车在运行过程中受到轨道随机不平顺激励的影响,车体和磁浮架的振动会传递至直线电机动子而导致气隙变化,变化后的电磁力反作用于电机悬挂系统,进而影响磁浮架和车体振动。二者的耦合振动一定程度上会影响高温超导磁浮列车的安全运行。为了减少轨道随机不平顺激励对电机悬挂系统的影响,文章建立了多刚体动力学理论模型,并在周期性激励的作用下,对理论模型进行了动力学响应的仿真验证,证明了动力学理论模型的正确性。进一步地,在UM软件中以电机法向力和轨道随机不平顺作为外部激励,对高温超导磁浮列车动力学模型进行仿真,研究了电机悬挂系统的垂向刚度对直线电机气隙、车体和悬浮架振动、列车运行平稳性等参数的影响并对该刚度值进行了合理优化。结果表明:增大直线电机悬挂系统的垂向刚度能一定程度提高车体平稳性;同时增大垂向刚度能一定程度上减小气隙的变化和电机的振动,从而降低和悬浮架的耦合作用。研究结果是在特定的结构参数、负载条件下的仿真分析结果,可为高温超导磁浮列车动力学分析提供一定参考作用。In the operation,high-temperature superconducting maglev trains are susceptible to the impact of random track irregularities.These irregularities cause vibrations of the carbody and maglev frame,which are transferred to the dynamic components of the linear motor,resulting changes in the air gap.The changed electromagnetic force reacts against the motor suspension system,causing further vibrations of the maglev frame and carbody.The coupled vibrations of both components influence the safe operation of high-temperature superconducting maglev trains to some extent.To mitigate the influence of random track irregularities on the motor suspension system,a multi-rigid-body dynamic theory model was established in this study.Through simulation verification of the dynamic response under periodic excitations,the correctness of the dynamic theory model was confirmed.Furthermore,within UM software,with the linear motor normal force and random track irregularities as external excitations,a simulation of the dynamics model of the high-temperature superconducting maglev train was conducted.The influence of the vertical stiffness of the motor suspension system on the air gap of the linear motor,the vibration of the carbody and suspension frame,and the train ride comfort was studied,and the optimal value for this stiffness was determined.The results show that increasing the vertical stiffness of the linear motor suspension system to a certain extent can improve the stability of the carbody.Additionally,increasing the vertical stiffness can reduce the variation in the air gap and motor vibration to a certain extent,thus decreasing the coupling effect with the suspension frame.The results obtained in this study are based on simulation analysis under specific structural parameters and load conditions,and they can provide valuable insights for the dynamic analysis of high-temperature superconducting maglev trains.

关 键 词：轨道随机不平顺 法向力 高温超导磁浮列车 直线电机悬挂 UM 

分 类 号：U237[交通运输工程—道路与铁道工程]