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A Comparison of Three Methods for the Measurement of Wheel Rail Contact

[+] Author Affiliations
R. S. Dwyer-Joyce, C. Yao, R. Lewis

University of Sheffield, Sheffield, UK

Paper No. IJTC2008-71077, pp. 541-543; 3 pages
  • STLE/ASME 2008 International Joint Tribology Conference
  • STLE/ASME 2008 International Joint Tribology Conference
  • Miami, Florida, USA, October 20–22, 2008
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4336-9 | eISBN: 978-0-7918-3837-2
  • Copyright © 2008 by ASME


Measurement of wheel rail contact has been carried out using three techniques in a lab based experiment. The simplest is with the use of commercially available pressure sensitive film. This has been compared to two methods based on reflected ultrasound. The proportion of an ultrasonic wave reflected from a contact depends on the degree of conformity between the surfaces. Maps of reflection have been produced by scanning a transducer back and forth over the region of contact. However, this scanning process is time consuming, and so would be unsuitable for measuring real wheel rail contacts travelling atfull train speed. For this reason a third approach has been used, whereby an array transducer performs a line scan of the contact. The motion of the wheel is then simulated to record several parallel scans to create a contact map.

Copyright © 2008 by ASME
Topics: Rails , Wheels



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