Creep curves at different rolling speeds were determined on a rolling contact two-disc test rig over a range of angles of attack. A model was developed to analyse the lateral adhesion ratio and the simulated friction creep curves correlated well with experimental results, especially at the high speeds where wheel squeal tends to occur. The modal frequencies and mode shapes determined via analytical calculation, FEM and impact hammer tests were shown to have good agreement. The amplitude of the dominant frequency of squeal in the sound spectra was used as an indicator for the generation of squeal. It was found that most squeal events occurred when the angle of attack is beyond 8 mrad. It was also noticed that the critical creepage for the measured friction creep curves is also around 8 mrad, indicating that squeal phenomena are due to the negative slope under dry conditions. Using a 1-DOF theoretical model, it was found that high-velocity vibrations tend to be triggered when the yaw angle is beyond the critical creepage, correlating well with the experimental results. By analysing the sound data, it was found that there are double peaks for the dominant modes. It was found that the frequency divergence between the double peaks increases with the rolling speed, which correlates well with the analytical prediction due to travelling wave phenomena.
Investigation of the effect of lateral adhesion and rolling speed on wheel squeal noise
2013
12 Seiten, 14 Bilder, 2 Tabellen, 16 Quellen
Article (Journal)
English
Investigation of the effect of lateral adhesion and rolling speed on wheel squeal noise
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