This paper compares the different effects of rail rotations versus rail lateral translations on wheel/rail (W/R) contact geometry and vehicle dynamic performance. This study, conducted by the Transportation Technology Center, Inc. (TTCI), shows that: rail rotation has significant effects on the W/R contact geometry, especially on contact positions and contact areas, while rail translation effects on wheel contact positions and contact areas are negligible; a W/R contact model with assumptions of rigid track or elastic track with only lateral and vertical rail translations cannot reflect the W/R contact geometry variations caused by rail rotations; the contact geometry variations caused by rail rotations strongly depend on the specific wheel and rail profiles under evaluation; proper rail rotation flexibilities within the safety limits could improve wheelset steering performance and decrease W/R contact stress and wear.


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    Title :

    Simulation of dynamic gauge widening and rail roll: effects on derailment and rolling contact fatigue


    Contributors:

    Published in:

    Vehicle System Dynamics ; 46 , sup1 ; 981-994


    Publication date :

    2008-09-01


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




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