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Judder vibration in disc brakes excited by thermoelastic instability

Oscar Altuzarra (Tel: +34‐946014174 fax: +34‐946014215, Department of Mechanical Engineering, University of the Basque Country, Alameda Urquijo S/N, Bilbao Spain)
Enrique Amezua (Tel: +34‐946014228 fax: +34‐946014215, Department of Mechanical Engineering, University of the Basque Country, Alameda Urquijo S/N, Bilbao Spain)
Rafael Avilés (Tel: +34‐946014222 fax: +34‐946014215, Department of Mechanical Engineering, University of the Basque Country, Alameda Urquijo S/N, Bilbao Spain)
Alfonso Hernández (Tel: +34‐946014222 fax: +34‐946014215, Department of Mechanical Engineering, University of the Basque Country, Alameda Urquijo S/N, Bilbao Spain)

Engineering Computations

ISSN: 0264-4401

Article publication date: 1 June 2002

1007

Abstract

Friction vibrations and noises which are common in brakes, have attracted a great deal of attention lately. This paper analyses low frequency vibrations in disc brakes excited at high car speed. This vibration, called judder, has a frequency in the range 10 to 300 Hz and usually comes in association with hum noises. The dynamic phenomenon shows two principal components, one normal and the other one tangential to the disc brake surface. It is explained how variations of friction coefficient, and thermoelastic instability caused by the tangential component, contribute to the appearance of judder. A numerical analysis in 3D using the finite element method has been implemented combining both tangential and normal components, and solving the thermoelastic process. Special attention is dedicated to the simulation of the thermoelastic process showing the correlation with experiments.

Keywords

Citation

Altuzarra, O., Amezua, E., Avilés, R. and Hernández, A. (2002), "Judder vibration in disc brakes excited by thermoelastic instability", Engineering Computations, Vol. 19 No. 4, pp. 411-430. https://doi.org/10.1108/02644400210430181

Publisher

:

MCB UP Ltd

Copyright © 2002, MCB UP Limited

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