This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Study on Drum Brake Judder
Technical Paper
891329
Annotation ability available
Sector:
Language:
English
Abstract
On the basis of the dynamometer test data and the observational materials, this paper demonstrates that the drum brake judder is a kind of self-excited vibration. A theory has been developed, which holds that the occurace of the judder depends on the dynamical stability of the braking apparatus which changes from an open loop-system into a closed-loop one with braking(dry friclional action). A 7 DOF dynamical model simulating the judder has been established on the basis of the theory. Two geometrical parameters, the radius difference and the eccentricity of the drum and the shoe, were introduced so as to calculate the braking efficiency factor under different contact states between the drum and the shoes, such as the heel and toe, the crown, complete, etc., which is of vital importance in the analysis of judder.
Recommended Content
Technical Paper | Mode Shape of a Squealing Drum Brake |
Technical Paper | Simplified Test Bench to Provide Fast Objective and Subjective Vibration Analysis |
Technical Paper | Torsional Vibration Absorbers: A Testing and Evaluation Apparatus |
Authors
Topic
Citation
Xiaoyue, C., Dihua, G., and Xiaodong, W., "A Study on Drum Brake Judder," SAE Technical Paper 891329, 1989.Also In
References
- Slack, I.R. “A Review of Commercial Vehicle Brakes” C79/76 I. Mech. E. 1976
- Tarte, J.H. “Disc Brake Squeal” SAE Paper 830530
- Sperr, R.T. “Brake Squeal” C95/71 I. Mech. E. 1971
- Sinclair, D. “Friction Vibrations” Journal of Applied Mechanics June 1955
- Basford, P.R. Twiss, S.B. “Properties of Friction Materials I-Experiments on Variables Affecting Noice” Trans. ASME 80 Feb. 1958
- Basford, P.R. Twiss, S.B. “Properties of Friction Materials II-Theory of Vibration in Brakes” Trans. ASME 80 Feb. 1958
- Kusano, M. others “Experimental Study on the Reduction of Drum Brake Noise” SAE Paper 851465
- Ree. S.K. “Friction Coefficient of Automotive Friction Materials-its Sensitivity to Load, Speed and Temperature” SAE Paper 740415
- Xiaoyue Chen “A Study on Drum Brake Judder” 1988 Tsinghua University