• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 20 Issue 3
Jun.  2007
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Article Contents
JIN Zhibin, QIANG Shizhong, LI Xiaozhen. Uniform White Noise Model for Time-Delay Multi-dimensional Rail Irregularity Excitation[J]. Journal of Southwest Jiaotong University, 2007, 20(3): 269-273.
Citation: JIN Zhibin, QIANG Shizhong, LI Xiaozhen. Uniform White Noise Model for Time-Delay Multi-dimensional Rail Irregularity Excitation[J]. Journal of Southwest Jiaotong University, 2007, 20(3): 269-273.

Uniform White Noise Model for Time-Delay Multi-dimensional Rail Irregularity Excitation

  • Received Date: 26 May 2006
  • Publish Date: 25 Jun 2007
  • To obtain rail irregularity samples for train-bridge vibration control and stochastic analyses,a simulation method of irregularities at all axles of a train was investigated.Rail irregularity at the first axle was generated by the white noise filtration method.To achieve wavelength selection of rail irregularity,a wideband identification method was proposed for the design of a shape filter.To take time-delay among different axles into account,a step-wised time delay system based on a high order Pade’s approximation of the short time-delay between adjacent axles was constructed.By combining the shape filter with the time-delay system,a state equation with uniform white noise as input and irregularities at all axles of a train as output was obtained.A numerical example shows that simulated irregularity samples accord well with the target irregularity power spectral density(PSD) and satisfy the time-delay relation among irregularities at different axles.

     

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