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Instabilités de contact : analyses temporelle, aux valeurs propres et validation expérimentale

Published online by Cambridge University Press:  06 February 2008

Anissa Meziane
Affiliation:
Laboratoire de Mécanique des Contacts et des Solides, INSA-Lyon, CNRS UMR 5259, 69621 Villeurbanne, France
Laurent Baillet
Affiliation:
Laboratoire de Géophysique Interne et de Tectonophysique, Université Joseph Fourier CNRS, BP 53, 38041 Grenoble Cedex 9, France
Bernard Laulagnet
Affiliation:
Laboratoire de Vibrations et Acoustique, INSA-Lyon, 20 avenue Albert Einstein, 69621 Villeurbanne, France
Claude Godeau
Affiliation:
Laboratoire de Mécanique des Contacts et des Solides, INSA-Lyon, CNRS UMR 5259, 69621 Villeurbanne, France
Yves Berthier
Affiliation:
Laboratoire de Mécanique des Contacts et des Solides, INSA-Lyon, CNRS UMR 5259, 69621 Villeurbanne, France
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Abstract

Les instabilités générées par frottement sont responsables des divers bruits tels que le crissement, le sifflement ou le broutement... Pour modéliser et comprendre ce phénomène d'instabilités, les analyses temporelles et aux valeurs propres sont utilisées sur un système modèle constitué de deux poutres en contact. Dans l'analyse aux valeurs propres, l'instabilité se manifeste par la coalescence de deux modes propres du système. Dans l'analyse temporelle, l'instabilité est caractérisée par des zones d'adhérence ou de décollement qui apparaissent au niveau de la surface de contact. Les résultats issus des deux analyses sont cohérents et complémentaires. Une validation expérimentale a été effectuée et montre une bonne corrélation entre les résultats numériques et expérimentaux.

Type
Research Article
Copyright
© AFM, EDP Sciences, 2008

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