IMPROVED WHEEL TREAD PROFILES FOR HEAVY FREIGHT VEHICLES

This paper describes recent theoretical and experimental work carried out by CN Rail Research in an effort to improve the performance of conventional 100-ton freight car trucks through the use of nonstandard wheel trend profiles. The steady state curving behaviour of a conventional three-piece frame truck has been studied using a nonlinear computer simulation to identify the effects of wheel conicity and track curvature on wheel-rail forces and on wear parameters. Lateral curving forces were compared from a field test using dynamometer tieplates on a 5-degree curve (350m radius) for four different wheel profiles including the AAR standard for new wheels. Preliminary results of a long term test on cars in revenue service are presented to show the effect of initial wheel profile on the early wear patterns as well as to show the methodology used for comparing the profiles under test. Finally, a brief review is made of the potential benefits resulting from the use of wheel profiles which are better adapted to service-worn rail head contours.

  • Supplemental Notes:
    • Contributed by the Rail Transportation Division of the American Society of Mechanical Engineers for Presentation at the Joint Railroad Conference, April 9-10, 1980, Montreal, Canada.
  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  United States  10016-5990
  • Authors:
    • Marcotte, P P
    • Mathewson, J R
    • Caldwell, W N
  • Publication Date: 1980-1

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 9 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00312390
  • Record Type: Publication
  • Report/Paper Numbers: 80-RT-3 Conf Paper
  • Files: TRIS
  • Created Date: Aug 27 1980 12:00AM