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A Method to Predict the Modal Damping in a Braking System based on the Damping of the Pad in its Free-Free Condition
Technical Paper
2006-01-3222
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Damping plays an important role in controlling brake squeal caused by the coupling between the rotor and the pads. Since most of the damping in the system (during brake squeal conditions) is coming from the pads, it becomes important to understand the relationship between the damping of the pad by itself in its free-free condition and that of the system in terms of braking pressure, temperature, and frequency. This relationship will help in understanding the effects of optimizing the damping of the pad, whether the damping comes from the friction material, backing layer, or add-on damping treatments. The purpose of this paper is to show that the modal strain energy method can be used to arrive at such a relationship.
Results of measurements made on the pads and rotor in their free-free condition and when assembled in the system under typical operating conditions that cause brake squeal, will be presented as well as the effectiveness of the modal strain energy method in predicting the relationship.
This paper will only focus on one of the possible brake squeal mechanisms: the coupling between the pads and the rotor, when they exhibit similar frequencies and wavelength.
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Citation
Nashif, A. and Denys, E., "A Method to Predict the Modal Damping in a Braking System based on the Damping of the Pad in its Free-Free Condition," SAE Technical Paper 2006-01-3222, 2006, https://doi.org/10.4271/2006-01-3222.Also In
References
- Kung, S. W. Saligrama, V. C. Riehle, M. A. “Modal Participation Analysis for Identifying Brake Squeal Mechanism” SAE Paper No. 2000-01-2764 2000
- Blaschke, P. Tan, M. Wang, A. “On the Analysis of Brake Squeal Propensity Using Finite Element Method” SAE Paper No. 2000-01-2765 2000
- Liu, W. Pfeifer, J. “Reducing High Frequency Disc Brake Squeal by Pad Shape Optimization” SAE Paper No. 2000-01-0444 2000
- Fieldhouse, J. D. “A Proposal to Predict the Noise Frequency of a Disc Brake Based on the Friction Pair Interface Geometry” SAE Paper No. 1999-1-3403 2000
- MSC Internal Testing Report
- Ungar, E. E. Kerwin, E. M. “Loss Factors of Viscoelastic Systems in Terms of Energy Concepts” Journal of the Acoustical Society of America 34 954 957 1964
- Nashif Ahid D. Jones David I. G. Henderson John P. “Vibration Damping” Wiley Interscience 1985
- Denys Eric Yang Michael Chen Frank “Brake Pad Damping: Measurement, Design and Application” Disc Brake Squeal SAE 2005