The modeling of wheel squeal in the time domain and its validation

Abstract

The sound pressure level of wheel squeal has been shown to increase with the angle of attack and rolling speed in both field and laboratory tests, but the causes behind the manner of increase are still unknown. To investigate this, a model in the time domain was extended by utilising nonlinear rolling contact theory developed specially for wheel squeal. This model is used to simulate the vibration velocity of a testrig wheel at different rolling speed and angle of attack. The results correlate well with the recorded sound pressure level of wheel squeal in laboratory tests. It was found that due to the interaction of wheel vibration with lateral force and lateral creepage the vibration velocity amplitude of the wheel increases with angle of attack and rolling speed increases. This explains why the sound pressure level of wheel squeal also increases in the same manner. The phenomenon is explained theoretically using the mechanics based model.

Investigation of the effect of longitudinal creepage on wheel squeal

“…When investigating the radiation of squeal noise, some researchers noticed that the high sound pressure levels of squeal noise can only be associated with the natural frequencies of a wheel (Stefanelli et al, 2006), so squeal noise is often termed as wheel squeal. Therefore, most experimental investigations of squeal noise focused on the wheel rather than the rail, using a small disc to simulate the rail (Hsu et al, 2007; Liu and Meehan, 2013, 2015a, 2016; White and Lewis, 2019).…”

Performance Analysis of Piezoelectric Actuators in Railway Wheel Squealing Noise Mitigation

“…is model was used to investigate the influence of rail and wheel contact position on the occurrence of the squeal noise. Supplementary analytical models in the time domain can also be found in [11][12][13][14][15][16], applied for studying various aspects of the wheel squeal noise. Most recently, a number of scientists have tried to introduce simplified and practical models.…”