This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Application of Holographic Interferometry to the Study of Disc Brake Noise
Annotation ability available
Sector:
Language:
English
Abstract
An experimental investigation of passenger car disc brake noise has been made using the double pulsed laser holographic technique, developed to allow simultaneous recording of three orthographic visual images of a vibrating brake system. Mechanical measurements of parameters such as disc surface strain, torque, pad deflections, pressure and noise complement the visual images for both continuous and intermittent brake noise and enable phase relationships of the component parts to be determined. Visual images of the vibrational characteristics of a noisy brake show the disc to be in a bending mode with diametral modes. The pad is seen to vibrate in a variety of modes such as bending, torsion and often a combination of both and that pad end flutter is shown to make a significant contribution to brake system noise. A series of holograms of the brake emitting first an intermittent noise and then a continuous noise show that the disc waveform is not stationary and that it is moving with respect to both the calliper and the disc. Fringe movement is shown to take place when a single hologram is viewed from different positions which provides supporting evidence that the waveform is not stationary in space. Most recent tests show that the waveform does rotate about the disc at a rate equivalent to the frequency of vibration divided by the diametral mode order.
Recommended Content
| Technical Paper | Application Limits of the Complex Eigenvalue Analysis for Low-Frequency Vibrations of Disk Brake Systems |
| Technical Paper | A Study on the Vehicle Body Effect on Brake Noise |
Authors
Citation
Fieldhouse, J. and Newcomb, P., "The Application of Holographic Interferometry to the Study of Disc Brake Noise," SAE Technical Paper 930805, 1993, https://doi.org/10.4271/930805.Also In
References
- LAMARQUE P.V. “Brake Squeak The Experiences of Manufacturers and Operators and Some Preliminary Experiments” Report No.8500B. Institution of Automobile Engineers, Research and Standards Committee 1935
- BASFORD P.R. TWISS S.B. “Properties of Friction Materials II - Theory of Vibration in Brakes” ASME. Trans 80 1958 402 410
- SPURR R.T. “A Theory of Brake Squeal” I. Mech. E Auto. Div. Proc. 1 1961/62 33 40
- EARLES CHAMBERS “Disc Brake Squeal Noise Generation: Predicting its Dependency on System Parameters Including Damping.” International Journal of Vehicle Design 8 4,5,6 538 552 1987
- JARVIS R.P. MILLS B. “Vibrations Induced by Dry Friction” Proc. IMechE 1963-64 178 32 847 866
- NORTH M.R. ”Disc Brake Squeal - A Theoretical Model” MIRA Research Report No 1972/5
- MILLNER N. “An Analysis of Disc Brake Squeal” SAE Paper No. 780332 Detroit 1978
- MURAKAMI H. TSUNDA N. KITAMURA T. “A Study Concerned with a Mechanism of Disc Brake Squeal” SAE Paper No. 841233 Michigan 1984
- LILES G. “An Analysis of Disc Brake Squeal Using Finite Element Methods” SAE Paper No. 891150 1989
- NISHIWAKI M. HARADA H. OKAMURA H IKEUCHI T. “Study on Disc Brake Squeal” SAE Paper No. 890864 1989
- LANG A.M. NEWCOMB T.P. “An Experimental Investigation into Drum Brake Squeal” IMechE Paper No. C382/051, EAEC conference on New Developments in Powertrain and Chassis Engineering Strasbourg 1989
- FELSKE A. HAPPE A. “Vibration Analysis by Double Pulsed Laser Holography” SAE Paper No. 770030 Detroit 1977
- FELSKE A. HOPPE G. MATTHAI H. “Oscillations in Squealing Disk Brakes - Analysis of Vibrating Modes by Holographic Interferometry” SAE Paper No. 780333 Detroit 1978
- FELSKE A. HOPPE G. MATTHAI H. “A Study of Drum Brake Noise by Holographic Interferometry” SAE Paper No. 800221 1980
- FIELDHOUSE J.D. NEWCOMB T.P. “An Investigation Into Disc Brake Noise Using Holographic Interferometry” 3rd International EAEC Conference on Vehicle Dynamics and Powertrain Engineering - EAEC No. 91084 June 1991 Strasbourg
- FIELDHOUSE J.D. NEWCOMB T.P. “The Technique of Holographic Interferometry used to Investigate Disc Brake Noise” 25th Silver Jubilee International Symposium on Automotive Technology and Automation (ISATA) - “Laser Applications for the Automotive Industry” Florence, Italy 1-5 June 1992
- FIELDHOUSE J.D. Newcomb T.P. “An Investigation Into Disc Brake Noise Using Holographic Interferometry” Autotech 1991 NEC Birmingham. IMechE.Ref.C427/l 1/213