Study on analytical model for curve squeal noise with coupled vibration between wheel and rail

Abstract

To simulate squeal noise at curved sections in railway lines and develop measures for the noise, a prediction model is required. In this study, an analytical model for a railway wheel and a rail, which are modeled with a disk and a roller, is developed. The model is based on vibration characteristics of the disk and the roller, which were derived from modal analysis, and the contact forces between them. This model also includes the two coupling modes, i.e. between the disk and the roller, between the vibration directions. By using the model, the disk vibration related to squeal noise are simulated and the peaks at the natural frequencies of the disk can be seen. These results show good agreement with the experimental results. This suggests that the model has potential to simulate the squeal noise. The model also shows that the disk vibration is greater when the natural frequencies of the roller in the vertical vibration are equal to that of the disk in the axial vibration. This indicates that the two couplings have the influence on the squeal noise.