This paper presents a model simulating rail roughness growth in which the interaction of a wheelset with the track is considered. The aim is to investigate any possible mechanism for roughness growth due to the coupling between the vertical dynamics, the torsional vibration across the axle of the wheelset and the non-steady contact mechanics. The time-domain simulations are carried out for a driven wheelset on tangent track. Both rigid and flexible are considered with parameter variations for moments of the wheelset, vehicle speeds and wavelengths of initial roughnesses. The 2D non-Hertzian and non-steady contact model used in simulations are based on influence coefficients obtained from a boundary element model. The nonlinear development of the rail roughnesses after millions of wheelset passages is also presented.


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    Title :

    A rail roughness growth model for a wheelset with non-steady, non-Hertzian contact


    Additional title:

    Modell zur Berechnung der Zunahme der Schienenrauheit bei einem Radsatz mit instationärem Nicht-Hertzschem-Kontakt


    Contributors:
    Xie, G. (author) / Iwnicki, S.D. (author)

    Published in:

    Vehicle System Dynamics ; 48 , 10 ; 1135-1154


    Publication date :

    2010


    Size :

    20 Seiten, 20 Bilder, 15 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English