Analysis of brake squeal noise using the finite element method: A parametric study

Júnior, Mário Trichês; Gerges, Samir N. Y.; Jordan, Roberto

doi:10.1016/j.apacoust.2007.10.003

Cited by 107 publications

(23 citation statements)

References 18 publications

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“…For instance, some researchers (Liu et al, 2007;Trichês Junior et al, 2008) considered only the disc brake and two pads. Hassan et al (2009) added the finger and piston to the FE model.…”

Section: Introductionmentioning

confidence: 99%

Effects of material properties on generation of brake squeal noise using finite element method

Belhocine¹,

Ghazaly

2015

Lat. Am. j. solids struct.

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This research paper is concerned with the disc brake squeal problem for passenger cars. The aim of the present research is developing a finite element model of the disc brake assembly in order to improve understanding of the influence of Young's modulus on squeal generation. A detailed finite element model of the whole disc brake assembly that integrates the wheel hub and steering knuckle is eveloped and validated using experimental modal analysis. Stability analysis of the disc brake assembly is accomplished to find unstable frequencies. A parametric study is carried to look into the effect of changing Young's modulus of each brake components on squeal generation. The results of simulation indicated that Young's modulus of disc brake components play a substantial role in generating the squeal noise.

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“…For instance, some researchers (Liu et al, 2007;Trichês Junior et al, 2008) considered only the disc brake and two pads. Hassan et al (2009) added the finger and piston to the FE model.…”

Section: Introductionmentioning

confidence: 99%

Effects of material properties on generation of brake squeal noise using finite element method

Belhocine¹,

Ghazaly

2015

Lat. Am. j. solids struct.

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“…This unstable vibration can be solved by complex eigenvalue analysis (Milner, 1978). Equation (1) is an equation of motion considering the frictional force (Trichês Júnior et al, 2008).…”

Section: Current Methods For the Stability Criterion Of Brake Squealmentioning

confidence: 99%

Structural instability of friction-induced vibration by characteristic polynomial plane applied to brake squeal

Inoue

Kamada

2020

JAMDSM

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Complex eigenvalue analysis has generally been applied to squeal improvement of automotive brake systems in recent years. Discrimination of the occurrence of unstable vibration by modal coupling has become common in brake design. However, the generation mechanism is not fully understood. In particular, the transition of the eigenvalue and the bifurcation phenomenon accompanying the change of the equation of motion are difficult to predict quantitatively. One reason is that a degree of instability can be expressed by real parts of eigenvalues, but the difficulty of the coupling cannot be determined by real parts of eigenvalues. In this report, to obtain a stability index before the coupling, characteristic polynomials are the subject of this research. For the structural instability problem of a two-degree-of-freedom system, which involves a typical friction-induced vibration, the positions of the eigenvalues are geometrically shown on a complex response surface using a real part of the characteristic polynomial. The characteristic polynomial of the two-degree-of-freedom system becomes a complex quartic function; as a result, a saddle-shaped response surface that intersects the complex space appears. Without damping, when the surface and a zero plane of the complex space intersect on an imaginary axis, uncoupled eigenvalues appear. When the surface does not intersect on the imaginary axis, the eigenvalues become complex, and unstable vibration occurs. In a parameter study, a friction coefficient raises the surface monotonously, while mass and stiffness change the eigenvalues in the same way as curve veering, and damping breaks the symmetry of the surface and shifts the surface to the stable side. The vertex in the imaginary axis cross section of the surface is a point at which the eigenvalues reach the coupling. This point serves as a guideline for the stability before the coupling. Consequently, it is useful for evaluating the transition of the eigenvalues.

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“…Although, various research and development efforts in experiments and numerical modeling have been made, a complete understanding of the behavior of the friction interface is a difficult task. It is due to multi-physical phenomena modifying the contact conditions during squeal such as applied pressure [2], humidity [3], thermal effect [4], tribology [5,6], wear [7,8] and friction coefficient between two facing surface of the pad and the disc [9]. It is well accepted that brake squeal is affected by many different phenomena at different scales.…”

Section: Introductionmentioning

confidence: 99%

Multi-Scale Contact Localization and Dynamic Instability Related to Brake Squeal

et al. 2020

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Friction-induced vibrations (brake squeal) produced during braking applications have been one of the major problems in the transportation for many years. It can be the most troublesome for passengers because of its high frequency and acoustic pressure. The role of frictional contact surface geometry on the occurrence of squeal was investigated recently by some researchers. However, it has never been systematically studied at different scales simultaneously. Contact localizations are induced on the one hand by macro effects such as thermal dilatation (macroscopic scale) and on the other hand, by the heterogeneity of third body (tribolayer) generated by friction (mesoscopic scale). The aim of this paper is to investigate the effect of contact localization at both scales through stability analysis on a simplified pad on disc system. The model has been developed numerically by the finite element method (FEM) to introduce a non-uniform contact at macroscopic and mesoscopic scales. The results showed a strong dependency between squeal frequencies and effective contact zone at macroscopic and mesoscopic scales for the investigated configuration. Especially, it is found that squeal frequencies depend on the contact area at a macroscopic scale whereas the probability of occurrence of squeal frequency strongly relies on mesoscopic contact distribution.

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Analysis of brake squeal noise using the finite element method: A parametric study

Cited by 107 publications

References 18 publications

Effects of material properties on generation of brake squeal noise using finite element method

Effects of material properties on generation of brake squeal noise using finite element method

Structural instability of friction-induced vibration by characteristic polynomial plane applied to brake squeal

Multi-Scale Contact Localization and Dynamic Instability Related to Brake Squeal

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