Excess elevation causes a reduction in the vertical loads carried by the wheels of a rail car on the outer rail of a curve. Track curvature causes lateral wheel/rail forces which, in the absence of sufficient restraining forces, will result in a wheel climb derailment. This report presents a low speed, quasi-static analysis for determining freight car wheel climb and rollover tendencies in response to combined excess elevation and curvature inputs. The vehicle types analyzed encompass North American rail freight cars with typical three-piece constant force friction damping trucks. Results are presented showing the tolerable limits of excess elevation as a function of curvature. Variations of the limits due to differences among major carbody, truck and wheel parameters are investigated. It is found that for loaded cars, c.g. height has the greatest effect on altering the limits of combined geometry while frictuon snubbing force has the least effect.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Wheel climb and rollover potential due to excess elevation and curvature


    Additional title:

    Gefahren der Entgleisung infolge von übermäßiger Kurvenüberhöhung und Krümmung


    Contributors:
    Schwarz, B. (author)


    Publication date :

    1991


    Size :

    9 Seiten, 12 Bilder, 6 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Understanding wheel-climb derailment

    Liu, Yan / Magel, Eric | IuD Bahn | 2007


    STEP CLIMB-OVER WHEEL DEVICE

    MIYAZAWA KUNIYUKI / MIURA YOSHIAKI | European Patent Office | 2016

    Free access

    Computing and displaying climb dive marker elevation

    PEARSON JOHN TIMOTHY / BUTLER LAWERANCE RAY / GRANDIN KEITH THOMAS et al. | European Patent Office | 2020

    Free access

    Computing and displaying climb drive marker elevation

    BUTLER LAWERANCE RAY / GRANDIN KEITH THOMAS / ROBB MICHAEL ALLEN et al. | European Patent Office | 2020

    Free access

    Wheel flange climb derailment criteria

    Elkins, J. A. / Wu, H. | British Library Conference Proceedings | 2000