Curve squeal is a strong tonal noise that may arise when railway vehicles negotiate tight curves. The aim of the project is to increase the understanding of squeal generation and to investigate the potential to reduce both the likelihood of squeal and its amplitude by modifying wheel and track design. In particular, a simplified engineering model for the prediction of both occurrence and amplitudes of curve squeal is being developed.
The project is divided into four parts: i) further extension of an existing model developed in the CHARMEC PhD project VB10 ii) validation of the model; iii) an extensive study to identify the essential parameters influencing curve squeal and; iv) investigation of the potential to reduce curve squeal noise.
The curve squeal model developed in the project is formulated in the time domain. It considers the dynamics of the contacting bodies and includes advanced contact mechanics tools. Special emphasis is placed on friction modelling, which is crucial for squeal prediction.
The project is carried out at the Divison of Applied Acoustics in research group Vibroacoustics.
The project is related to project CHARMEC VB12 High-frequency wheel-rail interaction.
Keywords: Curve squeal, wheel/rail interaction, contact mechanics, friction, frictional instability, engineering model, noise reduction