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Reduced-order modeling of train-curved-slab-track dynamics with the effects of fastening failures

考虑扣件失效影响的缩减高速铁路车辆-曲线无砟轨道耦合动力学模型

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Abstract

Fastening failures have frequently been found on China high-speed railway curved tracks in recent years. Thus the influence of fastening failures on high-speed train-track interaction in curved track needs to be analyzed. A train-curved slab track interaction model is built, in which the real shape of the curved rail is considered and modeled with reduced beam model (RBM) and curved beam theory, and the slabs are modeled with four-nodes Kirchhoff-Love plate elements. The present model is validated at first with different traditional models. Then the influence of fastening failure in curved slab track on train-track interaction dynamics is studied. A different number of failed fastenings is assumed to occur at the curved track, and different types of fastening failure including the fatigue fracture of the clip structure and failure of the rail pad are considered. Based on the calculation results, the fatigue fracture of the clip structure has little influence on train-track interaction dynamics. But when rail pad failure happens and its equivalent vertical stiffness and damping are less than one-tenth of its original, the fastening failure seriously affects the high-speed train operation safety, and it must be prevented.

摘要

近年来, 扣件故障在我国高速铁路线路曲线段中经常出现. 为了更好地对扣件故障进行处理, 有必要分析扣件故障对高速铁路车线耦合动力学响应的影响. 本文基于缩减方法建立了高速铁路车线耦合动力学模型, 其中钢轨采用截短梁方法和曲线梁理论进行建模, 而轨道板采用4节点Kirchhoff-Love版单元进行建模. 本文首先通过不同传统模型验证了车线耦合动力学模型, 然后基于该车线耦合动力学模型分析了扣件失效对车线耦合动力学响应的影响. 在分析过程中, 本文分别考虑了不同扣件失效数目和扣件失效类型. 由计算结果可见, 由弹条断裂引发的扣件故障对车线耦合动力学响应影响较小, 但是由扣件橡胶板损坏引发的扣件故障对车线耦合动力学响应影响明显, 因此必须严格防止此类扣件故障.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 12072293), the Project of State Key Laboratory of Traction Power for Southwest Jiaotong University (Grant No. 2021TPL-T10), China Scholarship Council (Grant No. 202007000115), the Key Scientific Research Fund Project of Sichuan Education Department (Grant No. 18ZA0454), and the Key Research Program of Xihua University (Grant No. Z1020212).

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Authors and Affiliations

  1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, China

    Yan Xu  (徐焱), Caijin Yang  (杨蔡进) & Weihua Zhang  (张卫华)

  2. Department of Engineering Mechanics, KTH Royal Institute of Technology, Stockholm, 10044, Sweden

    Zhendong Liu  (刘振东) & Sebastian Stichel

  3. Department of Mechanical Engineering, University of Maryland Baltimore County, Baltimore, Maryland, 21250, USA

    Weidong Zhu  (朱伟东)

  4. Department of Mechanical Engineering, Xihua University, Chengdu, 610039, China

    Xiaoying Liu  (刘小莹)

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  1. Yan Xu  (徐焱)
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  7. Xiaoying Liu  (刘小莹)
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Corresponding author

Correspondence to Caijin Yang  (杨蔡进).

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Author contributions

Yan Xu designed the research, developed the models, and wrote the original draft. Zhendong Liu validated the data and revised and edited the original draft. Caijin Yang contributed the original idea, provided the financial support, and revised and edited the final version. Weihua Zhang organized the manuscript. Weidong Zhu validated the idea and helped revise the draft. Sebastian Stichel helped revise the draft. Xiaoying Liu helped organize the manuscript.

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Xu, Y., Liu, Z., Yang, C. et al. Reduced-order modeling of train-curved-slab-track dynamics with the effects of fastening failures. Acta Mech. Sin. 38, 522039 (2022). https://doi.org/10.1007/s10409-022-22039-x

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