Study on Dynamic Response of Curved Track Subjected to Harmonic Loads Based on Periodic Structure Theory

The dynamic response of a curved track subjected to harmonic loads is studied in this paper. The track is considered as a curved Euler beam supported by periodically discrete fasteners. The displacement and rotation of the curved track in the frequency domain are expressed as the superposition of mode function. The periodic structure theory is applied to motion equations of curved track, so the dynamic response of track can be calculated in a reference cell. The frequency response of curved track due to non-moving harmonic loads is analyzed, and the effects of some parameters of track are discussed. Some conclusions are drawn as follows. The stiffness and damping of track affect the first peak of frequency response greatly, which corresponds to the resonance of the rail mass on the fastener stiffness. The fastener spacing affects not only the pinned-pinned frequency, but also the frequency response greatly. The amplitude of frequency response increases for the first peak if the spacing becomes large. The radius has significant influence on frequency response if the ratio of radius to fastener spacing is less than 20, while little influence on that for a large radius.

• Record URL:
  • https://doi.org/10.1061/9780784481257.014
• 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:
  • Liu, Weifeng
  • Du, Linlin
  • Ma, Longxiang
  • Liu, Weining
• 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 118-129
• Monograph Title: ICRT 2017: Railway Development, Operations, and Maintenance

Subject/Index Terms

• TRT Terms: Curved track; Dynamics; Frequency response; Rail fasteners; Railroad tracks; Spacing
• Subject Areas: Design; Railroads;

Filing Info

• Accession Number: 01869839
• Record Type: Publication
• ISBN: 9780784481257
• Files: TRIS, ASCE
• Created Date: Jan 15 2023 5:17PM