Abstract

Rolling noise is the main source of railway noise for a wide speed range. It is then essential for a railway company to understand the generation mechanisms to control it. Until now, SNCF, the French railway company, has used TWINS, the Track Wheel Interaction Noise Software, to predict the rolling noise. Based on the frequency-—domain approach, this software is very efficient for the case of straight standard ballasted tracks. However, as it runs in the frequency domain, this software is limited to cases of wheel and rail without discrete irregularities. A time-—domain approach has been then considered to extend the rolling noise modelling to the case of impact noise due to discontinuities, such as wheel flats or rail joints.

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