中国机械工程 ›› 2025, Vol. 36 ›› Issue (10): 2232-2240.DOI: 10.3969/j.issn.1004-132X.2025.10.009

• 机械基础工程 • 上一篇    

磁悬浮列车首次穿越失效可靠性研究

刘伟渭(), 李阔, 余玺, 唐爽权   

  1. 西南交通大学机械工程学院, 成都, 610031
  • 收稿日期:2024-09-09 出版日期:2025-10-25 发布日期:2025-11-05
  • 通讯作者: 刘伟渭
  • 作者简介:刘伟渭*(通信作者),男,1984年生,博士研究生。研究方向为轨道车辆系统动力学。发表论文20余篇。E-mail:liuweiwei1592@163.com
  • 基金资助:
    国家自然科学基金(51875481);四川省科技计划重点研发项目(2023YFN0079)

Research on First-passage failure and Reliability Analysis of Maglev Trains

Weiwei LIU(), Kuo LI, Xi YU, Shuangquan TANG   

  1. School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031
  • Received:2024-09-09 Online:2025-10-25 Published:2025-11-05
  • Contact: Weiwei LIU

摘要:

为了得到磁悬浮列车首次穿越失效特性,建立了随机参激和随机外激作用下常导电磁悬浮列车的动力学模型,在Hamilton理论框架下建立首次穿越可靠性函数,采用Crank-Nicolson差分法对后向Kolmogorov方程进行数值求解,探究初始能量、随机外激、随机参激、低随机激励和列车速度对磁悬浮列车首次穿越的影响。研究结果表明,初始能量的增大会使得发生首次穿越的时间提前;增大随机外激和随机参激都会使平均首次穿越时间减小,其中随机外激对平均首次穿越时间的影响程度要大于随机参激的影响;在低随机激励的作用下磁悬浮列车几乎不发生首次穿越;随着列车运行速度的提高,平均首次穿越时间也在减小,发生首次穿越失效的最大概率增大。

关键词: 磁悬浮列车, 随机激励, 首次穿越, 可靠性

Abstract:

In order to obtain the first-passage failure characteristics of maglev trains, a dynamics model was established for electromagnetic suspension trains under the action of parametric excitation and external excitation, the first-passage reliability function was established under the framework of Hamilton's theory, and the backward Kolmogorov equation was solved numerically by using a new type of Crank-Nicolson difference method to investigate the effects of the initial energy, stochastic external excitation, stochastic parametric excitation, low stochastic excitation and train speed on the first-passage of maglev trains. The results show that the increase of initial energy will make the first-passage time earlier. The increase of stochastic external excitation and stochastic parametric excitation will make the average first-passage time decrease, where the influences of stochastic external excitation on the average first-passage time are larger than that of stochastic parametric excitation, and the first-passage hardly occurs under the action of low stochastic excitation. As the train speed increases, the average first-passage time decreases and the maximum probability of first-passage failure increases.

Key words: maglev train, random excitation, first-passage failure, reliability

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