Abstract
It was reported recently that railpads can be included as a continuous elastic support of the rail and the model was justified from experiments. In general, however, railpads are installed discretely on sleepers with a regular span. The effect of the discrete railpad was not clearly examined so far in such a high frequency range. In this paper, the effect of the railpads in track modelling for high frequencies is investigated by means of the finite element analysis. To do that, the railpads are regarded as `a continuous elastic support` and `a discrete elastic support` in this paper. The dispersion relations and decaying features are predicted and compared between the two models up to 80 kHz.
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