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.
- 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.
American Society of Mechanical EngineersTwo Park Avenue
New York, NY United States 10016-5990
- Marcotte, P P
- Mathewson, J R
- Caldwell, W N
- Publication Date: 1980-1
- Features: Appendices; Figures; References; Tables;
- Pagination: 9 p.
- TRT Terms: Flanges; Force; Rail (Railroads); Rolling contact; Steering; Technology; Train track dynamics; Vehicle design; Wear; Wheels
- Uncontrolled Terms: Wheel profiles
- Geographic Terms: Canada
- Old TRIS Terms: Wheel flange forces; Wheel tread design
- Subject Areas: Design; Railroads; Vehicles and Equipment;
- Accession Number: 00312390
- Record Type: Publication
- Report/Paper Numbers: 80-RT-3 Conf Paper
- Files: TRIS
- Created Date: Aug 27 1980 12:00AM