Predictive models of friction-induced vibration have proved elusive despite decades of research. There are many mechanisms that can cause brake squeal; friction coupled systems can be highly sensitive to small perturbations; and the dynamic properties of friction at the contact zone seem to be poorly understood. This paper describes experimental and theoretical work aimed at identifying the key ingredients of a predictive model. A large-scale experiment was carried out to identify squeal initiations using a pin-on-disc test rig: approximately 30,000 squeal initiations were recorded, covering a very wide range of frequencies. The theoretical model allows for completely general linear systems coupled at a single sliding point by friction: squeal is predicted using a linearised stability analysis. Results will be presented that show that almost all observed squeal events can be predicted within this model framework, but that some subsets require innovative friction modelling: predictions are highly dependent on the particular choice of friction model and its associated parameters.
- Noise Control and Acoustics Division
What Kind of Friction Model Is Needed to Predict Brake Squeal?
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Butlin, T, & Woodhouse, J. "What Kind of Friction Model Is Needed to Predict Brake Squeal?." Proceedings of the ASME 2012 Noise Control and Acoustics Division Conference at InterNoise 2012. ASME 2012 Noise Control and Acoustics Division Conference. New York City, New York, USA. August 19–22, 2012. pp. 203-213. ASME. https://doi.org/10.1115/NCAD2012-0576
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