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XIANG Jun, CENG Qing-yuan. Analysis method of stability and critical speed for train-track (bridge) time-variable system under lateral vibration condition[J]. Journal of Traffic and Transportation Engineering, 2011, 11(1): 19-24. doi: 10.19818/j.cnki.1671-1637.2011.01.004
Citation: XIANG Jun, CENG Qing-yuan. Analysis method of stability and critical speed for train-track (bridge) time-variable system under lateral vibration condition[J]. Journal of Traffic and Transportation Engineering, 2011, 11(1): 19-24. doi: 10.19818/j.cnki.1671-1637.2011.01.004
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Analysis method of stability and critical speed for train-track (bridge) time-variable system under lateral vibration condition

doi: 10.19818/j.cnki.1671-1637.2011.01.004

  • School of Civil Engineering and Architecture, Central South University, Changsha 410075, Hunan, China

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  • Author Bio:

    XIANG Jun(1968-), male, professor, PhD, +86-731-82539785, jxiang@mail.csu.edu.cn

  • Received Date: 2010-12-11
  • Publish Date: 2011-02-25
    Abstract
  • On the basis of the mechanism of train derailment caused by unknown reasons and the energy increment criterion for checking the stability of equilibrium state of a system in motion, the analysis method of lateral vibration stability of train-track(bridge) time-variable system and the calculation methods of critical speed and admissible limit speed for the system under lateral vibration condition were put forward. Under lateral vibration condition, for the system, the maximum input energy and its increment were determined, the limit resistant force working and its increment were calculated, the judging rules of vibration stability were set up, and the critical speed was computed. Through an example, the lateral vibration stability of high-speed train and ballastless track system and the running safety control indexes of high-speed train were calculated. Computation result shows that the critical speed of the system is 647.3 km·h-1, the admissible limit speed is 517.84 km·h-1, and the anti-derailment safety degree is 1.85. So, high-speed train safely runs on ballastless track at the design speed of 350 km·h-1.

     

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