Journal ArticleDOI
Complex eigenvalue analysis and dynamic transient analysis in predicting disc brake squeal
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TLDR
In this article, a detailed three-dimensional finite element model of a real disc brake is developed and three different contact regimes are examined in order to assess the best correlation between the two methodologies.Abstract:
There are typically two different methodologies that can be used to predict squeal in a disc brake, i.e., complex eigenvalue analysis and dynamic transient analysis. The positive real parts of complex eigenvalues indicate the degree of instability of the disc brake and are thought to associate with squeal occurrence or noise intensity. On the other hand, instability in the disc brake can be identified as an initially divergent vibration response using transient analysis. From the literature it appears that the two approaches were performed separately, and their correlation was not much investigated. In addition, there is more than one way of dealing the frictional contact in a disc brake. This paper explores a proper way of conducting both types of analyses and investigates the correlation between them for a large degree-of-freedom disc brake model. A detailed three-dimensional finite element model of a real disc brake is developed. Three different contact regimes are examined in order to assess the best correlation between the two methodologies.read more
Citations
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Journal ArticleDOI
Transient non-linear dynamic analysis of automotive disc brake squeal – On the need to consider both stability and non-linear analysis
TL;DR: In this paper, the authors investigated the contribution of fundamental frequencies and harmonic components in non-linear transient and stationary dynamics for disc brake system subjected to single and multi-instabilities and showed that an under-estimation of the unstable modes observed in the nonlinear time simulation can be calculated by the stability analysis.
Journal Article
Brake saueal analysis by finite elements
TL;DR: In this paper, an approximate analysis method for brake squeal is presented using MSC/NASTRAN, where a geometric nonlinear solution is run using a friction stiffness matrix to model the contact between the pad and rotor.
Journal ArticleDOI
Wear prediction of friction material and brake squeal using the finite element method
TL;DR: In this article, a detailed three-dimensional finite element (FE) model of a real disc brake is developed considering the real surface topography of the friction material, and confirmed the adopted model is made between predicted and measured static contact pressure distribution.
Journal ArticleDOI
A new treatment for predicting the self-excited vibrations of nonlinear systems with frictional interfaces: The Constrained Harmonic Balance Method, with application to disc brake squeal
TL;DR: In this paper, a nonlinear method called the Constrained Harmonic Balance Method (CHBM) is proposed for nonlinear systems subject to flutter instability, which is an extension of the Harmonic balance method (HBM) for disc brake squeal.
Journal ArticleDOI
Overview of automotive noise and vibration
TL;DR: An overview of automotive NVH engineering can be found in this paper, where the authors classify the interior noise into powertrain-related NVH, road-and tyre-relatedNVH, and wind-related NEH.
References
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Journal ArticleDOI
Automotive disc brake squeal
TL;DR: A comprehensive review and bibliography of works on disc brake squeal is provided in this paper, where background sections on vibrations, contact and disc brake systems are also included, in an effort to make this review accessible to a large audience.
Journal ArticleDOI
Acoustics of friction.
TL;DR: An overview of the acoustics of friction is presented by covering friction sounds, friction-induced vibrations and waves in solids, and descriptions of other frictional phenomena related to acoustic.
Journal ArticleDOI
Numerical analysis of automotive disc brake squeal: a review
TL;DR: In this paper, the authors reviewed numerical methods and analysis procedures used in the study of automotive disc brake squeal and found that the complex eigenvalue analysis is still the approach favored by the automotive industry and the transient analysis is gaining increasing popularity.
Journal ArticleDOI
Effects of damping on mode-coupling instability in friction induced oscillations
Norbert Hoffmann,Lothar Gaul +1 more
TL;DR: In this article, the authors investigated qualitative and quantitative aspects of the mode-coupling instability in the presence of structural damping, which will be assumed as linear viscous, and developed a feedback-loop formalism that allows a more detailed understanding of the underlying mechanical processes.