Development of analytical model for a wheel and rail vibration associated with curve squeal noise of railways

In this study, an analytical model for the vibrations of both a railway wheel and rail related to curve squeal noise was developed. The model was based on lumped parameter systems from the vibration characteristics of the wheel and rail and contact forces between them. Moreover, this model included two coupling factors between a wheel and rail, and between two vibration directions. The parameters of an actual wheel and track were applied to the model and their vibrations were estimated. The measurement of the curve squeal was also carried out at a curved section in an actual railway test line. From these measurement results, the peak frequencies in the estimated wheel vibration when passing through a curve are well simulated. Although the model needs to be improved in terms of the vibration magnitude, it has sufficient potential to simulate the vibration related to squeal noise.