Dynamic wheel-rail force can be limited to high-frequency components owing to imperfections in the wheel-rail contact surface ( P 1 ) and may also contain low-frequency components owing to coupled wheel-rail vibrations in phase on the ballast ( P 2 ). Previous studies on dynamic wheel-rail forces have focused on the quality index of surface roughness (QI) of only rail welds. In this study, the influences of rail surface roughness and track stiffness of a ballasted track on dynamic wheel-rail forces currently employed in high-speed lines were assessed by performing field measurements using actual vehicles running along the service lines. The theoretical dynamic wheel-rail force determined using a previous theory was compared with the dynamic wheel-rail force determined through field measurements. At a constant QI, an increase in the vertical track stiffness caused an increase in P 2 . Therefore, the vertical track stiffness affects P 2 more strongly than P 1 . Hence, P 1 is more affected by QI and train velocity than is P 2 . Further, it is inferred that the results of multiple regression analysis obtained using measured data such as QI, vertical track stiffness, and P 2 can be used to predict the peak dynamic forces acting on ballasted tracks.


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    Titel :

    Influence of Track Support Stiffness of Ballasted Track on Dynamic Wheel-Rail Forces


    Beteiligte:
    Choi, Jungyoul (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    19.01.2013


    Format / Umfang :

    102013-01-01 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch