Analysis of Track Critical Velocity and Track Vibration under Tram Loading

Track vibration of a tramway in operation was theoretically analyzed. The relationships of critical velocity with elastic modulus of subgrade and thickness of track beds were obtained by solving vibration equation. It was shown that the critical velocity was greater than the design speed of trams. Another vibration differential equation was established to analyze track vibration. Both equations adopted moving impact load and ignored the impact of damping, but irregularities of rails were considered in the second equation. The analytical solutions of vibration deflection and acceleration were deduced. Based on the solutions and superposition principle, the dynamic responses under single axle loading and tram loading were analyzed. The results indicate that: (1) vibration deflection increases exponentially with irregularities amplitude; and (2) vibration acceleration has a negative logarithmic correlation with irregularity amplitude.

• Record URL:
  https://doi.org/10.1061/9780784413425.001
• Availability:
  • Find a library where document is available. Order URL: http://ascelibrary.org/doi/book/10.1061/9780784413425
• Supplemental Notes:
  • © 2014 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Ling, Jianming
  • Su, Baolei
  • Liang, Guoxi
  • Wang, Shuo
• Conference:
  • Geo-Shanghai 2014
  • Location: Shanghai , China
  • Date: 2014-5-26 to 2014-5-28
• Publication Date: 2014-5

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 1-9
• Monograph Title: Advances in Soil Dynamics and Foundation Engineering

Subject/Index Terms

• TRT Terms: Critical velocity; Defects; Foundations; Mechanical loads; Mechanical vibration; Modulus of elasticity; Railroad tracks; Subgrade materials; Trolley cars
• Subject Areas: Design; Geotechnology; Railroads; Vehicles and Equipment; I22: Design of Pavements, Railways and Guideways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01527153
• Record Type: Publication
• ISBN: 9780784413425
• Files: TRIS, ASCE
• Created Date: May 30 2014 3:29PM