The dynamic impact forces due to the wheel defect such as a flat is a main concern for a heavy freight train operating at high speed. The present investigation employs a pitch plane vehicle model coupled with a comprehensive three-layer track system model to study the impact force generated in the wheel-rail interface due to the presence of wheel flats. The wheel-rail contact is modelled using non-linear Hertzian contact theory. Responses in terms of wheel-rail impact load and forces transmitted to bearings, pad and ballast are evaluated in an attempt to identify desirable design and operating factors. Wheel-rail impact loads due to the presence of multiple flats either in single or different wheels in-phase or out-of-phase conditions are evaluated and analysed. A detailed parametric study is carried out that includes the variations in selected vehicle, track, operational as well as flat parameters. The results show that the effect of multiple flats is insignificant if they are more than 45 apart. The impact due to single wheel flat can be larger than in-phase flats at each wheel due to the presence of pitch dynamics. The parametric study shows that other than speed, depth and length of the flats are most sensitive parameters, and there exists a critical length at each flat depth that leads to the largest impact load.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Dynamic analysis of pitch plane railway vehicle-track interactions due to single and multiple wheel flats


    Beteiligte:


    Erscheinungsdatum :

    2008


    Format / Umfang :

    9 Seiten, 15 Bilder, 1 Tabelle, 17 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Analysis of pitch plane railway vehicle-track interactions due to single and multiple wheel flats

    Uzzal, R.U.A. / Ahmed, A.K.W. / Rakheja, S. | British Library Online Contents | 2009



    Analysis of pitch plane railway vehicle—track interactions due to single and multiple wheel flats

    Uzzal, R U A / Ahmed, A K W / Rakheja, S | SAGE Publications | 2009


    JRC2008-63023 Dynamic Analysis of Pitch Plane Railway Vehicle-Track Interactions Due to Single and Multiple Wheel Flats

    Uzzal, R.U.A. / Ahmed, W. / Rakheja, S. et al. | British Library Conference Proceedings | 2008