To investigate railway impact noise caused by discrete rail or wheel irregularities, such as wheel flats, rail joints, switches and crossings, a time-domain wheel/rail interaction model is needed. However, time-domain models are normally time consuming to solve and this makes it difficult to carry out parametric studies and gain insight into physical behaviour. A simple mass-spring equivalent track model is developed here to gain insight into the impact vibration induced by a wheel flat irregularity. With the track system simplified to only three degrees-of-freedom, the calculation times of the wheel/rail interaction simulation are reduced by a factor of 10 compared to a corresponding finite element track model. Using this very efficient time-domain wheel/rail interaction model, the characteristics of impact noise in the audio frequency range due to a wheel flat are studied.


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    Title :

    Characterizing Wheel Flat Impact Noise with an Efficient Time Domain Model


    Additional title:

    Notes Numerical Fluid Mech.




    Publication date :

    2015-01-01


    Size :

    8 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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