Calculation of moving Green functions for high-speed railway tracks

Issues concerning the railway industry, such as wheel/rail rolling surface roughness, corrugation and wheel/rail noise, are generated from train/track dynamic interactions. Due to the high train speed, train/track interactions are of high frequencies, and involve complex vibrational resonances and propagations in the track. To reflect these features, new modelling methodologies are still under development. One task is to model the track and predict track dynamics. In this paper, the Fourier transform-based method is first introduced. Then the method is applied to calculate moving Green functions for a high-speed track and to discuss their properties. It is hoped that the current effort will help fully explore the usefulness of the Green function method for train/track interactions.