摘要
针对高温超导磁浮车刚性悬浮架曲线通过性差,文章提出了一种具有一定点头和摇头自由度的半解耦悬浮架结构,将高温超导的悬浮力和导向力简化为线性特性,建立了高温超导磁悬浮车辆的动力学理论模型,通过UM软件,在周期性激励的作用下,对理论模型进行了动力力学响应的仿真验证,证明了动力学理论模型的合理性.文章进一步利用UM软件分析了高温超导磁浮车的水平曲线通过性能,对比了悬浮架不同垂向扭转刚度、横向扭转刚度、空气弹簧垂向刚度对杜瓦的横向位移、垂向位移的影响.仿真结果表明,释放一定点头自由度和摇头自由度的半解耦悬浮架,能够更好地适应曲线轨道的线路弯曲和线路扭曲,减少了构架对悬浮系统的不利影响,充分发挥了高温超导钉扎效应的特性,提高了车辆的曲线通过性能,同时合理的空气弹簧刚度能够很好地抑制杜瓦的振动,使车辆运行平稳.最后提出了满足车辆安全运行的悬浮架方案,高温超导磁悬浮车辆曲线通过性能有明显的提升.
Abstract
To enhance the curve negotiation performance of high-temperature superconducting(HTS)maglev trains equipped with a rigid levitation frame,this paper proposes a semi-decoupled levitation frame structure with specific degrees of freedom in both pitching and yawing.Initially,a dynamic theoretical model for HTS maglev trains was established,utilizing linear characteristics derived by sim-plifying the levitation and guidance forces stemming from HTS.This theoretical model was confirmed rational following the validation through dynamic response simulations conducted using UM software under periodic excitations.Subsequently,UM software was further utilized to assess the horizontal curve-passing performance of HTS maglev trains.Furthermore,comparisons were made regarding the impacts of different vertical and lateral torsional rigidities of levitation frames,along with varying air spring vertical rigidities on Dewar lateral and vertical displacements.The simulation results indicate improved adaptability in the proposed semi-decoupled levitation frame with specific pitching and rolling degrees of freedom on curved and twisted track configurations.By reducing the adverse effects of the framework on the levitation system and maximizing the pinning effect characteristics of HTS,this approach demonstrates effective in en-hancing the trains'curve-passing performance.Additionally,an appropriate air spring rigidity is also found a contributor to effectively suppressing Dewar vibration,thus further ensuring the operational quality of trains.This paper conclusively proposes a levitation system solution that aligns with the safety requirements of train operation,displaying a strong potential to improve the curve-passing perfor-mance of HTS trains.
基金项目
西南交通大学学科交叉研究专项(2682021ZTPY109)
维普
万方数据