Abstract
In order to predict and control wheel/rail impact noise due to discontinuities such as wheel flats, rail joints and rail welds in Chinese raised-speed railway, a model which could simulate wheel/rail impact noise is set up based on the vehicle-track coupled dynamics theory and the sound radiation theory. The acoustics performances of wheel/rail impact noise had been studied in frequency and time domain. The results demonstrated that discontinuities such as wheel flats and rail welds in Chinese raised-speed railway which cause wheel/rail impact noise are important sources; the impact noise due to wheel flats and rail welds is related to the train speed and geometry of wheel/rail surface defects.
