To study the dynamic response of railway ballast excited by forces from the moving train at different speeds, a finite element model of track is developed. The rail is represented by a Timoshenko beam on discrete pad-sleeper-ballast supports. The ballast is considered as a three-dimensional finite element model. Wheel/rail irregularities and moving loads are taken into account. The displacement, acceleration and dynamic stress at different parts of the ballast are calculated. Vibration propagation is also presented. The responses of ballast, for constant loads and travelling at constant speeds over track with and without irregularity, are studied. It is shown that, at high speeds, stone may be projected out of the ballast bed.


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    Title :

    The Dynamic Response of Railway Ballast to the Action of Trains Moving at Different Speeds


    Contributors:
    Luo, Y (author) / Yin, H (author) / Hua, C (author)


    Publication date :

    1996-07-01


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    The dynamic response of railway ballast to the action of trains moving at different speeds

    Luo, Y. / Yin, H. / Hua, C. | British Library Online Contents | 1996


    `Flat maintaining' speeds trains

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    Railway ballast requirements

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