Simulation of Transient Nonlinear Friction-Induced Vibrations Using Complex Interface Modes: Application to the Prediction of Squeal EventsReport as inadecuate




Simulation of Transient Nonlinear Friction-Induced Vibrations Using Complex Interface Modes: Application to the Prediction of Squeal Events - Download this document for free, or read online. Document in PDF available to download.

Shock and Vibration - Volume 2017 2017, Article ID 6107251, 10 pages - https:-doi.org-10.1155-2017-6107251

Research Article

Laboratoire de Tribologie et Dynamique des Systèmes, UMR CNRS 5513, École Centrale de Lyon, 36 avenue Guy de Collongue, 69134 Écully Cedex, France

Centre Lyonnais d’Acoustique, Université de Lyon, 69622 Lyon, France

Institut Universitaire de France, 75005 Paris, France

Correspondence should be addressed to J.-J. Sinou

Received 25 September 2016; Accepted 30 November 2016; Published 15 January 2017

Academic Editor: Tony Murmu

Copyright © 2017 J.-J. Sinou and S. Besset. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

During the past decades, the problem of friction-induced vibration and noise has been the subject of a huge amount of works. Various numerical simulations with finite elements models have been largely investigated to predict squeal events. Although a nonlinear analysis is more predictive than Complex Eigenvalues Analysis, one of the main drawbacks of the time analysis is the need of large computational efforts. In view of the complexity of the subject, this approach appears still computationally too expensive to be used in industry for finite element models. In this study, the potential of a new reduced model based on a double modal synthesis i.e., a classical modal reduction via Craig and Bampton plus a condensation at the frictional interface based on complex modes for the prediction of self-excited vibrations of brake squeal is discussed. The effectiveness of the proposed modal reduction is tested on a finite element model of a simplified brake system. It will be shown that numerical results of times analysis by applying the proposed reduction correlate well with those of the nonlinear analysis based on a reference model, hence demonstrating the potential of using adapted modal reductions to predict the squeal propensity and to estimate self-excited vibrations and noise.





Author: J.-J. Sinou and S. Besset

Source: https://www.hindawi.com/



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