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Comparison of Disc and Drum Brake Rotor Mode Movement
Technical Paper
2000-05-0338
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Language:
English
Abstract
Disc brake noise is generally accompanied by a movement of the rotor mode of vibration. It is shown that the speed of mode movement is related to the frequency of noise generation divided by the rotor vibration mode order, the direction being the same as disc rotation. The same type of movement is also seen in a drum brake generating low frequency noise. The backplate is shown to have a moving mode with a speed that is twice the noise frequency divided by the mode order. A possible drum mode is indicated and it is suggested that this rotates at the frequency of noise and in the direction of drum rotation. It is proposed that the mechanism involved with disc mode movement and drum/backplate mode movement may have a common explanation. It is explained that this mode movement is the result of two contra-rotating waveforms of differing amplitudes - this being an explanation for both brake types as a feature of brake noise.
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Citation
Fieldhouse, J. and Beveridge, C., "Comparison of Disc and Drum Brake Rotor Mode Movement," SAE Technical Paper 2000-05-0338, 2000.Also In
References
- Fieldhouse JD Optics and Lasers in Engineering -special issue 25 6 December 1996 455 494 “Double Pulsed Holography Used to Investigate Noisy Brakes”
- Fieldhouse JD Lang AM Newcomb TP “Holographic and Analytical Techniques Applied to Drum Brake Squeal” EAEC 5th International Congress “The Automotive Industry meets the Challenges of the year 2000” June 1995 Strasbourg
- Fieldhouse J.D. Rennison M. “An Investigation of Low Frequency Drum Brake Noise” Proceedings of the 16th Annual SAE Brake Colloquium and Engineering Display Ref. P-327 0-7680-02761 65 73 982250 1998
- Lang A.M. Newcomb T.P. “An Experimental Investigation into Drum Brake Squeal” EAEC Conference on New Developments in Powertrain and Chassis Engineering Strasbourg 1989 431
- Ouyang H Mottershead, JE Brookfield DJ James S “Dynamic Instabilitiesina SimpleModelof a Car Disc Brake” 17 th Annual Brake Colloquium 1999 SAE ref 1999-01-3409 , Preceeding Reference P-349 117 127