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.
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1 June 2002
Research Article|
June 01 2002
Judder vibration in disc brakes excited by thermoelastic instability
Oscar Altuzarra;
Oscar Altuzarra
Tel: +34‐946014174 fax: +34‐946014215, Department of Mechanical Engineering, University of the Basque Country, Alameda Urquijo S/N, Bilbao Spain
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Enrique Amezua;
Enrique Amezua
Tel: +34‐946014228 fax: +34‐946014215, Department of Mechanical Engineering, University of the Basque Country, Alameda Urquijo S/N, Bilbao Spain
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Rafael Avilés;
Rafael Avilés
Tel: +34‐946014222 fax: +34‐946014215, Department of Mechanical Engineering, University of the Basque Country, Alameda Urquijo S/N, Bilbao Spain
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Alfonso Hernández
Alfonso Hernández
Tel: +34‐946014222 fax: +34‐946014215, Department of Mechanical Engineering, University of the Basque Country, Alameda Urquijo S/N, Bilbao Spain
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Publisher: Emerald Publishing
Online ISSN: 1758-7077
Print ISSN: 0264-4401
© MCB UP Limited
2002
Engineering Computations (2002) 19 (4): 411–430.
Citation
Altuzarra O, Amezua E, Avilés R, Hernández A (2002), "Judder vibration in disc brakes excited by thermoelastic instability". Engineering Computations, Vol. 19 No. 4 pp. 411–430, doi: https://doi.org/10.1108/02644400210430181
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