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基于结构参数不确定的列车-轨道-路基系统耦合振动概率分析

     

摘要

列车荷载作用下有砟轨道-路基耦合系统结构参数的不确定性引起的随机振动对行车安全的影响不可忽略。本文提出了一种基于概率密度演化理论的三维列车-有砟轨道-路基耦合系统随机振动概率仿真分析模型,该模型可同时考虑轨道随机不平顺、道砟层和路基层随机刚度、随机阻尼等耦合效应,为列车-轨道-路基系统随机振动分析提供了一种全新的计算分析方法。采用数论方法对多维随机参数进行代表性离散数组点设计。结果表明,与蒙特卡罗模拟方法相比,概率密度演化模型开展随机振动分析更为准确、高效。基于算例开展了多维随机参数的敏感性分析,系统地评估了不确定结构随机参数的相对重要性,并在此基础上探讨了列车-轨道-路基系统的随机概率演化机制。

著录项

  • 来源
    《中南大学学报》|2021年第7期|P.2238-2256|共19页
  • 作者单位

    School of Civil Engineering Central South University Changsha 410075 ChinaNational Engineering Laboratory for High-Speed Railway Construction Changsha 410075 ChinaKey Laboratory of Engineering Structures of Heavy Haul Railway of Ministry of Education Central South University Changsha 410075 China;

    School of Civil Engineering Central South University Changsha 410075 ChinaNational Engineering Laboratory for High-Speed Railway Construction Changsha 410075 ChinaKey Laboratory of Engineering Structures of Heavy Haul Railway of Ministry of Education Central South University Changsha 410075 China;

    School of Civil Engineering Central South University Changsha 410075 ChinaNational Engineering Laboratory for High-Speed Railway Construction Changsha 410075 ChinaKey Laboratory of Engineering Structures of Heavy Haul Railway of Ministry of Education Central South University Changsha 410075 China;

    School of Civil Engineering Central South University Changsha 410075 ChinaNational Engineering Laboratory for High-Speed Railway Construction Changsha 410075 ChinaKey Laboratory of Engineering Structures of Heavy Haul Railway of Ministry of Education Central South University Changsha 410075 ChinaDepartment of Civil and Environmental Engineering University of Illinois at Urbana-Champaign Urbana IL 61801 United States;

    School of Civil Engineering Central South University Changsha 410075 ChinaNational Engineering Laboratory for High-Speed Railway Construction Changsha 410075 ChinaKey Laboratory of Engineering Structures of Heavy Haul Railway of Ministry of Education Central South University Changsha 410075 China;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 道路工程;
  • 关键词

    列车-轨道-路基耦合系统; 结构参数不确定性; 随机振动; 概率密度演化方法; 轮轨关系;

  • 入库时间 2023-07-25 15:45:07

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