The interaction between wheel and rail is the predominant source of noise emission from railway operations in a wide range of conventional speeds. On the one hand, this wheel/rail noise concerns rolling noise and impact noise caused by the vertical interaction excited by roughness and discrete irregularities of the wheel/rail running surfaces, respectively. On the other hand, it concerns curve squeal noise, which occurs in tight curves and is generated by the tangential interaction.
In the completed CHARMEC PhD project VB10, a model has been developed for the combined vertical and tangential wheel/rail interaction, which is valid in the frequency range relevant for noise generation (from approximately 100 Hz to 5 kHz). The current post-doc project VB12 is a continuation of VB10 and focuses on different aspects of high-frequency wheel/rail interaction. The objective is to further develop, apply and validate the simulation model e.g. for the case of excitation by wheel flats and for curve squeal.
The overall aim of the project is to contribute to the understanding and ultimately to the reduction of wheel/rail noise. The work in the parallel CHARMEC PhD project VB11 is being supported.
The project is carried out att the Division of Applied Acoustics in the research group Vibroacoustics.
This project is related to the project CHARMEC VB11 - Abatement of curve squeal noise from trains
Keywords: wheel/rail interaction, railway noise, curve squeal, wheel flats, time-domain modelling, noise reduction