Dynamic response of the LIM wheel/rail train in curved section
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(1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Chongqing Rail Transit Construction Office, Chongqing 400014, China)

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U212.32

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    Abstract:

    The regularity of curved railway line conditions on the dynamic response of linear induction motor (LIM) wheel/rail train was investigated to provide theoretical basis for revising design specifications of railway line. Train-line dynamic model of LIM wheel/rail transit system was established, in which the vertical electromagnetic force of an LIM could change with vehicle speed and motor air gap. Effects of vertical electromagnetic force, vehicle speed, curve radius, superelevation, and track irregularity on train dynamic response were simulated and analyzed. Results show that track irregularity and high speed had significant effects on air gap. When the train passed through curved section of small radius, vertical electromagnetic force could remarkably reduce the values of derailment coefficient and wheel load reduction rate. The maximum values of derailment coefficient, wheel load reduction rate, wheel-rail lateral force, vehicle lateral acceleration, and vehicle lateral displacement were significantly affected by vehicle speed, curve radius, and superelevation. The fitting formulas of 5 kinds of maximum dynamic response were proposed, with which the reasonable matching of vehicle speed, curve radius, and superelevation range could be carried out, and the reasonable vehicle limit in curved section could be determined.

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History
  • Received:September 02,2018
  • Revised:
  • Adopted:
  • Online: December 15,2019
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