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首页> 外文期刊>Applied Acoustics >Effect of track irregularity on the dynamic response of a slab track under a high-speed train based on the composite track element method
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Effect of track irregularity on the dynamic response of a slab track under a high-speed train based on the composite track element method

机译：基于复合轨道单元法的轨道不平顺对高速列车下平板轨道动力响应的影响

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摘要

Slab tracks are common track structures in high-speed railways. In this study, a vehicle/slab track interaction model is developed based on vehicle-track coupling dynamics theory, and composite track elements are used to rapidly model the finite element equations of the slab track based on the stationary value theory of total potential energy. In the model, the rail is represented as a discretely-supported infinite beam, the slab and the base are considered as continuously-supported free beams, and the connections of the track structure are modelled as viscoelastic spring-damping elements. The composite track element method effectively derives the equations of motion with high or low degrees of freedom by increasing or decreasing the number of track elements; therefore, it can be applied to the dynamic analysis of the track and to investigate the dynamic responses of the slab track system, including the rail, pad, slab, Cement asphalt mortar (CA mortar) and base. The equations of motion of the vehicle system are also proposed using the finite element method. The vehicle system and the slab track system interact through the vertical wheel/rail force, which is approximated using Hertz contact theory. The dynamic responses of a slab track subjected to moving vehicle loads are analysed using dynamic simulations and are compared with another classic simulation method. The effects of random track irregularity and vehicle velocity on the dynamic responses of the slab track system are discussed. (C) 2015 Elsevier Ltd. All rights reserved.
机译：平板轨道是高速铁路中常见的轨道结构。在这项研究中，基于车辆-轨道耦合动力学理论建立了车辆/平板轨道相互作用模型，并基于总势能的固定值理论，使用复合轨道元素对平板轨道的有限元方程进行快速建模。在该模型中，将轨道表示为离散支撑的无限梁，将平板和基座视为连续支撑的自由梁，并将轨道结构的连接建模为粘弹性弹簧阻尼元件。通过增加或减少轨道元素的数量，复合轨道元素方法可以有效地推导具有高或低自由度的运动方程。因此，它可用于轨道的动态分析，并研究平板轨道系统的动态响应，包括轨道，垫块，平板，水泥沥青砂浆（CA砂浆）和基础。还使用有限元方法提出了车辆系统的运动方程。车辆系统和平板轨道系统通过垂直车轮/轨道力相互作用，该垂直力通过赫兹接触理论近似得出。使用动态仿真分析了板条轨道在移动车辆载荷下的动态响应，并将其与另一种经典的仿真方法进行了比较。讨论了随机轨道不规则性和车速对平板轨道系统动力响应的影响。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Applied Acoustics》 |2015年第12期|72-84|共13页
  • 作者

    Yang Xinwen; Gu Shaojie; Zhou Shunhua; Yang Jianjin; Zhou Yu; Lian Songliang;

  • 作者单位

    Tongji Univ, Minist Educ, Key Lab Rd & Traff Engn, Shanghai 201804, Peoples R China;

    Tongji Univ, Minist Educ, Key Lab Rd & Traff Engn, Shanghai 201804, Peoples R China;

    Tongji Univ, Minist Educ, Key Lab Rd & Traff Engn, Shanghai 201804, Peoples R China;

    Lanzhou Jiaotong Univ, Sch Mechatron Engn, Lanzhou 730070, Peoples R China;

    Tongji Univ, Minist Educ, Key Lab Rd & Traff Engn, Shanghai 201804, Peoples R China;

    Tongji Univ, Minist Educ, Key Lab Rd & Traff Engn, Shanghai 201804, Peoples R 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

    High-speed train; Slab track; Finite element method; Coupling dynamics; Vibration;

    机译：高速列车;平板轨道;有限元法;耦合动力学;振动;

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