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Influence of slab arch imperfection of double-block ballastless track system on vibration response of high-speed train

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Abstract

According to the structural damage characteristics of ballastless track of high-speed railway by investigation, a novel method for evaluating the influence of ballastless track of high-speed railway is presented. The dynamic model of ballastless track with damage property is established based on train-track spatial vibration system. The calculated and in situ tested results were compared to certify the model and computation program. Taking the track slab imperfections occurred in a tunnel along the real high-speed railway as an example, the influence of vibration responses of the train-track system with slab imperfections under different conditions is calculated and analyzed in comparison with normal slab. In addition, the maintenance effect on the repaired track structure is evaluated by considering the operate safety and comfort of high-speed train. It is concluded that large amplitude of slab arch imperfection results in higher acceleration of slab and car body. Therefore, train operation speed should be controlled in accordance with the safety standard such as wheel load reduction rate and derailment coefficient. In the case of low amplitude of slab arch imperfection, train operation speed should be controlled in accordance with the comfort standard such as Sperling index. The specific operation velocities were given correspondingly. Therefore, the mechanism and conclusions above can forecast intuitively in the field of track maintenance. The paper proposes a practical and valuable method for evaluating double-block ballastless track of high-speed railway.

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Acknowledgements

Projects (U1261113) jointly supported by the National Natural Science Foundation Committed of China and Shenhua Group Corporation Limited; Project (20100162110022) supported by Special Fund for Doctor Programs in Institutions of Higher Learning of China; Project (TPL0901 and TPL1214) supported by the Open Program of the Traction Power State Key Laboratory; Project (GJJ151173, GJJ151175) supported by Jiangxi Science and Technology Foundation of Education Department.

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Authors and Affiliations

  1. College of Civil Engineering, Central South University, Changsha, 410075, China

    Cuiying Yu, Jun Xiang & Siying He

  2. School of Architectural Engineering, Nanchang Institute of Technology, Nanchang, 330044, China

    Cuiying Yu

  3. College of Metropolitan Transportation, Beijing University of Technology, Beijing, 100124, China

    Jianhong Mao

  4. School of Civil and Architectural Engineering, East China Jiaotong University, Nanchang, 330013, China

    Kai Gong

Authors
  1. Cuiying Yu
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  2. Jun Xiang
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  3. Jianhong Mao
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  4. Kai Gong
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  5. Siying He
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Corresponding author

Correspondence to Jun Xiang.

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Technical Editor: Kátia Lucchesi Cavalca Dedini.

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Yu, C., Xiang, J., Mao, J. et al. Influence of slab arch imperfection of double-block ballastless track system on vibration response of high-speed train. J Braz. Soc. Mech. Sci. Eng. 40, 109 (2018). https://doi.org/10.1007/s40430-018-0972-4

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  • DOI: https://doi.org/10.1007/s40430-018-0972-4

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