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LUO Ren, CENG Jing, DAI Huan-yun, TENG Wan-xiu. Running adaptability of high-speed EMU[J]. Journal of Traffic and Transportation Engineering, 2011, 11(6): 37-43. doi: 10.19818/j.cnki.1671-1637.2011.06.006
Citation: LUO Ren, CENG Jing, DAI Huan-yun, TENG Wan-xiu. Running adaptability of high-speed EMU[J]. Journal of Traffic and Transportation Engineering, 2011, 11(6): 37-43. doi: 10.19818/j.cnki.1671-1637.2011.06.006
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Running adaptability of high-speed EMU

doi: 10.19818/j.cnki.1671-1637.2011.06.006

  • Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

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  • Author Bio:

    LUO Ren (1979-), male, associate researcher, PhD, +86-28-86466085, luorenswjtu@tom.com

  • Received Date: 2011-07-21
  • Publish Date: 2011-12-25
    Abstract
  • A nonlinear dynamics simulation model of vehicle system was set up for high-speed EMU(electric multiple units).The actual running conditions were considered, the numerical simulation method was adopted to research the running adaptability and stability of EMU, and the matching relationships of wheel profile wear and wheel/rail contact geometry, primary guiding stiffness and equivalent conicity were analyzed.Analysis result indicates that wheel/rail matching relationship and vehicle suspension parameters are the most important factors affecting the running adaptability.The hollow wear of wheel tread has greater influence on the running stability than the uniform wear with the same wear depth.The bogie with large guiding stiffness is unstable when the low conicity tread is used, while the bogie with small guiding stiffness is also unstable when the equivalent conicity increases because of wear.In the design process of EMU, the proper wheel/rail profile matching relationship and suspension parameter optimization are determined according to the dynamics requirement of running line.For the bogie with small primary guiding stiffness, LMA type wheel tread with small initial conicity is used.While for the bogie with large guiding stiffness, wheel/rail matching relationship with equivalent conicity larger than 0.10 is required.During EMU operation, the hollow wear of wheel tread should be prevented, and the reasonable rail profile is maintained through grinding rail.

     

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