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A probabilistic model for track random irregularities in vehicle/track coupled dynamics

机译：车辆/轨道耦合动力学中轨道随机不规则性的概率模型

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摘要

Track irregularities generally viewed as weak stationary random processes are perhaps the most important excitations to the vehicle/track coupled system. To better clarify the random vibration characteristics and probabilistic relationships between track random irregularities and dynamic behaviors of vehicle/track systems, it is a necessity to consider the full properties of track irregularities on amplitude, frequency and probability in vehicle/track interactions. The purpose of this paper is to develop a probabilistic model to select representative and realistic track irregularity sets from numerous data with higher efficiency and accuracy. To establish the vehicle/track interaction model, the finite element method and vehicle/track coupled dynamics are adopted and effectively combined, which can be used to reveal the interaction mechanisms between the moving vehicles and the guiding tracks. Moreover, the probabilistic transmission relationships between track irregularities and system responses are addressed by introducing a probability density evolution method. Through detailed comparisons with the experimental measurements and other advanced models, this proposed model is proved to be fairly effective and highly efficient.
机译：通常被认为是微弱的平稳随机过程的轨道不规则现象可能是车辆/轨道耦合系统最重要的激励因素。为了更好地阐明轨道随机不规则性与车辆/轨道系统动态行为之间的随机振动特性和概率关系，有必要考虑轨道不规则性在车辆/轨道相互作用中的振幅，频率和概率的全部特性。本文的目的是建立一个概率模型，以更高的效率和精度从大量数据中选择具有代表性的现实轨道不平顺集合。为了建立车辆/轨道相互作用模型，采用了有限元方法和车辆/轨道耦合动力学方法，并将其有效地结合起来，可以用来揭示运动车辆与导轨之间的相互作用机理。此外，通过引入概率密度演化方法解决了轨道不规则性与系统响应之间的概率传递关系。通过与实验测量值和其他高级模型的详细比较，该提议的模型被证明是相当有效和高效的。

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  • 来源
    《Applied Mathematical Modelling》 |2017年第11期|145-158|共14页
  • 作者

    Xu Lei; Zhai Wanming; Gao Jianmin;

  • 作者单位

    State Key Laboratory of Traction Power, Southwest Jiaotong University, No.111, First Section, North of Second Ring Road, Chengdu, Sichuan, China;

    State Key Laboratory of Traction Power, Southwest Jiaotong University, No.111, First Section, North of Second Ring Road, Chengdu, Sichuan, China;

    State Key Laboratory of Traction Power, Southwest Jiaotong University, No.111, First Section, North of Second Ring Road, Chengdu, Sichuan, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Probabilistic model; Probability density evolution method; Track random irregularity; Vehicle/track coupled dynamics;

    机译：概率模型概率密度演化法;跟踪随机不规则;车辆/轨道耦合动力学;

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