Longitudinal-vertical dynamics of a high-speed train rescued by locomotives during braking on grades
Longitudinal-vertical dynamics of a high-speed train rescued by locomotives during braking on grades
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DOI：
10.1080/00423114.2022.2083641
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发表时间：
2022-06
影响因子：
3.6
通讯作者：
Lai Wei;Jingsong Zeng;Sheng Qu;Caihong Huang;Qunsheng Wang
中科院分区：
文献类型：
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作者：
Lai Wei;Jingsong Zeng;Sheng Qu;Caihong Huang;Qunsheng Wang
研究了机车救援高速列车在坡道制动过程中的垂向耦合动力学。车钩在压力作用下的折裂行为将影响车钩列车的运行安全。本文首先介绍了机车对列车救援场景下的垂向冲击试验。通过对列车和车钩的拟静力分析，研究了坡道上车钩折裂的机理。建立了列车和车钩系统的三维动力学模型。该模型考虑了车钩的旋转运动、缓冲器的滞回特性和制动特性。再现并验证了内燃机车救援高速列车制动过程中的典型响应。进一步评估了所选方案的垂向相互作用的运行安全性。研究了列车速度和轨道坡度对垂向动力学的影响。提出了两种改进措施，即限制车钩节距角和车钩力，并给出了可能的解决方案。
This paper describes the longitudinal-vertical coupling dynamics of a high-speed train rescued by locomotives during the braking process on grades. The coupler jackknifing behaviour under compressive forces will affect the running safety of the coupling train. In this paper, the longitudinal-vertical impacts by field testing for the locomotive to train rescue scenario are firstly introduced. The quasi-static force analyses of the train and couplers are carried out to study the coupler jackknifing mechanism on graded tracks. The three-dimensional dynamic model of the train and coupler system is then developed. In this model, the coupler rotational motions, hysteresis characteristic of draft gears, braking characteristic are taken into account. The typical responses during the braking process for the high-speed train rescued by the diesel locomotive are reproduced and verified. The running safety of the longitudinal-vertical interaction for selected scenarios is further evaluated. The Influences of train speed and track gradient on the longitudinal-vertical dynamics are also studied. Two improvement measures, including the limitation of the coupler pitch angle and coupler force, are discussed to provide possible solutions.