Track Random Irregularity Analysis for Heavy-Haul Railway

Based on the long-term inspection of the track irregularities in a domestic heavy-haul line, power spectral density (PSD) functions of the vertical surface profile, the alignment, the cross-level, and the gauge in the wavelength band of 1-30 m are developed and compared with the FRA PSD. PPSD functions related to the probability distribution function are also proposed. Then, the generated track irregularities are input into the heavy-haul vehicle–track coupled dynamics model in order to verify the effectiveness of the PSD functions. The obtained simulation results are compared with the field test. The results show that PSD of track irregularities for heavy-haul railway are basically similar with the FRA PSD functions of Class 6 track irregularities and obviously superior to that of Class 5 track irregularities. In addition, PSD functions of track irregularities basically follow the chi-square distribution with two degrees of freedom, hence the weighted PSD can be used to represent different percentile PSD reasonably. Theoretically, the dynamic responses of the simulation, i.e., wheel–rail vertical force, the sleeper vertical displacement, the accelerations of the sleeper, and ballast bed, are basically consistent with the experimental data under the impact of a wagon.

• Record URL:
  • https://doi.org/10.1061/9780784481257.001
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784481257
• Supplemental Notes:
  • © 2018 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Zhang, Dawei
  • Wang, Kaiyun
  • Zhai, Wanming
  • Xu, Lei
• Conference:
  • First International Conference on Rail Transportation 2017
  • Location: Chengdu Sichuan Provence, China
  • Date: 2017-7-10 to 2017-7-12
• Publication Date: 2018

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 1-8
• Monograph Title: ICRT 2017: Railway Development, Operations, and Maintenance

Subject/Index Terms

• TRT Terms: Defects; Dynamic models; Heavy haul; Power spectra; Railroad tracks; Rolling contact; Simulation
• Subject Areas: Maintenance and Preservation; Railroads;

Filing Info

• Accession Number: 01869824
• Record Type: Publication
• ISBN: 9780784481257
• Files: TRIS, ASCE
• Created Date: Jan 14 2023 5:11PM