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DING Jun-jun, LI Fu. Numerical simulation of one side rail irregularity[J]. Journal of Traffic and Transportation Engineering, 2010, 10(1): 29-35. doi: 10.19818/j.cnki.1671-1637.2010.01.006
Citation: DING Jun-jun, LI Fu. Numerical simulation of one side rail irregularity[J]. Journal of Traffic and Transportation Engineering, 2010, 10(1): 29-35. doi: 10.19818/j.cnki.1671-1637.2010.01.006
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Numerical simulation of one side rail irregularity

doi: 10.19818/j.cnki.1671-1637.2010.01.006

  • School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

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  • Author Bio:

    DING Jun-jun(1985-), male, doctoral student, +86-28-87601196, dumdream0851@163.com

    LI Fu(1956-), male, professor, PhD, +86-28-87601881, lifu@home.swjtu.edu.cn

  • Received Date: 2009-08-12
  • Publish Date: 2010-02-25
    Abstract
  • The power spectrum density of track irregularity was transformed to time-domain irregularity by inverse Fourier transform, and the correlation of various irregularities of America center line was analyzed. The relation between center line and left/right rail irregularities was used to transform the center line irregularity to the irregularities of left and right rails, and the rail/wheel interaction force response was computed by the simulation of vehicle system dynamics. The one side irregularities of America five grade railway and Chinese main line was compared.Analysis result indicates that all correlation coefficients among the center line irregularities are less than 0.3, they are low correlative and are considered independent of each other. All correlation coefficients of wheel/rail responses between the center line and left/right rail irregularities were more than 0.8, they are high correlative, so the equivalency transform is right.The one side power spectrum density of America five grade railway is higher than that of the Chinese main line in low frequency and is less in high frequency.

     

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