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Analyse non-linéaire des instabilités multiples aux interfaces frottantes : application au crissement de frein

Abstract : Disc brake squeal is an undesirable noise generated by the friction at the disc/pad contact interfaces. This nonlinear autonomous dynamic system is subjected to self-excited vibrations that are responsible for squeal noise up to 110dB. Disc brake squeal phenomenon is generally investigated by a stability analysis only, that has a tendency to over-estimate the instability domain. In this view, the objective of this thesis is thus to extend the brake squeal study to the nonlinear domain using less time consuming nonlinear methods than the traditional temporal methods. Initially, we were interested in a simplified modeling of a brake system made up of a pad and a disc brake. Both elements were reduced on their contact interfaces thus allowing to keep nonlinearities while treating moreover small size models. Secondly, we spread an original nonlinear method based on the common harmonic balance methods. It makes it possible to compute periodic or pseudo-periodic dynamic responses of an autonomous nonlinear system depend upon it is subjected to one or more unstable modes. Finally, we applied this method to the reduced brake model and showed its computational advantage compared to temporal methods. This study has thrown light on complex nonlinear phenomena such as the growing vibration amplitudes while damping increases or the disappearance of an unstable mode in the dynamic response.
Mots-clés : Crissement de frein
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Submitted on : Wednesday, February 9, 2011 - 8:59:07 AM
Last modification on : Wednesday, November 20, 2019 - 2:27:04 AM
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  • HAL Id : tel-00564493, version 1



Nicolas Coudeyras. Analyse non-linéaire des instabilités multiples aux interfaces frottantes : application au crissement de frein. Sciences de l'ingénieur [physics]. Ecole Centrale de Lyon, 2009. Français. ⟨NNT : 2009ECDL0035⟩. ⟨tel-00564493⟩



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