Computing contact forces is rather quick if rigid profiles are used but the results are numerically uncertain because of discontinuities in contact locations. Using elastic profiles is physically correct but gives rise to new difficulties to locate multi contacts (2 or 3 at the same time on the same wheel) and implication of high frequency modes due to wheel and rail separation through high stiffnesses.
This paper presents a method to avoid discontinuities calculating the contact forces of one wheelset using a rigid profile process associated to a limited number of equivalent parameters, as functions of the lateral wheelset relative displacement “y”. These parameters are precomputed once for all using a time consuming elastic multicontact program associated with an identification process. Comparisons between forces calculated by this quick new method and the slow complex code are good.
NEW METHOD FOR REDUCING THE MULTICONTACT WHEEL/RAIL PROBLEM TO ONE EQUIVALENT CONTACT PATCH
Vehicle System Dynamics ; 20 , sup1 ; 475-489
1992-01-01
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
New method for reducing the multicontact wheel/rail problem to one equivalent contact patch
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