The approximate, non-iterative method for solving the normal contact together with Kalker's FASTSIM algorithm adapted for non-elliptical contact area constitute a simplified model of wheel/rail contact mechanics for non-Hertzian problems. The presented model assumes semi-elliptical normal pressure distribution in the direction of rolling. The contact area is found by virtual penetration of wheel and rail. The normal pressure is calculated by satisfying contact conditions at the geometrical point of contact. The calculation is non-iterative, fast and completely reliable. It may be carried out on-line in MultiBody Systems (MBS) computer codes. The tests using the programme CONTACT by Kalker and experience from application in MBS codes show that the model is suitable for technical applications. The creep forces have been calculated with the FASTSIM algorithm, adapted for a non-eliptical contact area. The experience using the model in rail vehicle simulations confirms the usefulness of the model. The model was also applied in wear simulations making it possible to speed up the computation and to ensure stability of the process by parallel treatment of the short- and the long-term dynamics. Verfication using measured results showed good agreement of simulation and measured results.
A simplified model of wheel/rail contact mechanics for non-Hertzian problems and its application in rail vehicle dynamic simulations
Vereinfachtes Modell der Rad-Schiene-Kontaktmechanik bei Nicht-Hertz-Aufgaben und seine Anwendung in dynamischen Simulationen von Eisenbahnfahrzeugen
Vehicle System Dynamics ; 46 , 1/2 ; 27-48
2008
22 Seiten, 27 Bilder, 1 Tabelle, 22 Quellen
Aufsatz (Zeitschrift)
Englisch
Taylor & Francis Verlag | 2008
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