Analysis of automotive disc brake squeal considering damping and design modifications for pads and a disc

Kim, C.; Zhou, Ke Dong

doi:10.1007/s12239-016-0021-1

Cited by 25 publications

(10 citation statements)

References 16 publications

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“…A very good overview of the numerical analysis of automotive disc brake squeal is presented by Chen et al [22], Ouyang et al [23], [24] and Chen [25]. More recently, Kim and Zhou [26], Esgandari and Olatunbosun [27] [28] and Tisson et al [29] demonstrated the possibilities in improving squeal prediction and reducing its occurrence.…”

Section: Symbolmentioning

confidence: 99%

Methodology for predicting brake squeal propensity using complex eigenvalue analysis, including thermo-mechanical effects

Tirovic

Vianello

Bannister

2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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With brake squeal being most prevalent Noise Vibration and Harshness (NVH) issue in modern vehicles, this paper presents an improved methodology for brake squeal propensity prediction at the design stage. The research established four clearly defined "Stages" in conducting Finite Element (FE) squeal analyses, describing crucial input data, modelling procedures, outputs and results validations. Stage 1 deals with freefree modal characteristics of individual brake components and their material characteristics. Stage 2 combines individual parts, conducting Brake Assembly Mechanical FE Analyses. Stage 3 concentrates on fully Coupled Thermo-mechanical FE Analyses, and the concluding Stage 4 focuses on Brake Assembly Stability Analyses. Validations proved that very accurate predictions are possible, but the geometries, material characteristics and established modelling procedures must be strictly followed. Material characteristics were most prone to introduce discrepancies with measured values. 'Generic' values are found to be unacceptable and conducting own measurements was necessary, in particular for the friction material, whose anisotropic properties have been measured in detail, leading to high accuracy in predicting pad natural modes and frequencies. In Stage 4 the stability analyses of the full brake assembly were based on the Complex Eigenvalue Analysis (which included thermal aspects), with the sign of the real part giving an indication of stability and the imaginary part defining the frequency of the unstable mode. Instabilities and frequencies predicted match well with the values measured in dynamometer tests, clearly demonstrating the influence of thermal effects. The final output of the procedures described in this Paper is a validated 3D thermo-mechanical FE NVH brake assembly model in which natural frequencies and modes, instabilities and contributing factors can be predicted at any time during a brake application.

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Section: Symbolmentioning

confidence: 99%

Methodology for predicting brake squeal propensity using complex eigenvalue analysis, including thermo-mechanical effects

Tirovic

Vianello

Bannister

2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Also, it is necessary to perform the optimization of the design for the braking discs, as well as their influence on the noise appearing [8]. The great influence on the noise that originates from the ventilated braking discs are having ribs [9]. It is essential to investigate the design of the ribs, and chose the optimal ribs shape, that will reduce the generation of noise, and should keep the same level of the performances of the braking disc [10].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Braking Disc Ribs and Applied Material on the Natural Frequency

Abdullah

Stojanović

Grujić

2021

Int. J. Precis. Eng. Manuf.

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One of the important problems for which must be found an optimal solution is the noise that originate from vehicles. In this research paper, it was investigated deeply the effect of ribs shape and type of material on the noise of ventilated braking discs. Four different ventilated braking discs were selected to achieve the numerical analysis, all these brakes have the same overall dimensions, except the ribs shape is different. The materials used in this work are the cast iron, AMC and CCM for all four discs. The main aim of this paper is to find the optimal ribs shape, as well as the manufacturing material for the braking disc by applying Taguchi method. The percentage share of the ribs shapes as well as of applied material influence on the noise generation, were determined by applying Analysis of Variance-ANOVA. Finally, it was found that the material influence is most significant with 74.48%, while the ribs shape influence on the noise generation is 24.24%. The most optimal results obtained for the 2nd model which was made from CCM, compared with other suggested models. KeywordsVentilated braking discs • Noise • Modal analysis • Taguchi method • ANOVA List of Symbols M Mass, kg C Damping, Ns/m K Stiffness, N/m F Force, N u Generalized displacement vector,y n Results of the numerical analysis, Hz n Number of the numerical analysis

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“…As it is nearly impossible to study the effect of all parameters, given their wide range, experimentally as well as analytically, it is required to find alternative ways to accurately study the indoor concentration distribution patterns of decay products. In recent times, Computational Fluid Dynamics (CFD) approach has been established as a convenient substitute for restrictive experimental and theoretical approaches; offering fast, reasonable and confident solutions in various research contexts [16,17] including aerosol science and technology [18,19] and radon thoron studies [20,21].…”

Section: Introductionmentioning

confidence: 99%

A Computational Fluid Dynamics code for aerosol and decay-product studies in indoor environments

Agarwal

Sahoo

Kumar

et al. 2021

J Radioanal Nucl Chem

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In the present work, Computational Fluid Dynamics (CFD) code has been used to simulate the behaviour of aerosols and decay products of 222 Rn/ 220 Rn in indoor environments. The code has been incorporated with simulation modules describing relevant physical processes governing the aerosol and decay product dynamics such as particle deposition, gravitational settling, thermophoresis, coagulation and size dependent attachment of decay products to aerosol. Subsequently, reliability and consistency of the CFD code has been evaluated and validated by comparing simulated results with analytical and simulation results of well-known cases reported in literature. Comparison showed a good agreement within ± 3.5%.

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Analysis of automotive disc brake squeal considering damping and design modifications for pads and a disc

Cited by 25 publications

References 16 publications

Methodology for predicting brake squeal propensity using complex eigenvalue analysis, including thermo-mechanical effects

Methodology for predicting brake squeal propensity using complex eigenvalue analysis, including thermo-mechanical effects

The Influence of the Braking Disc Ribs and Applied Material on the Natural Frequency

A Computational Fluid Dynamics code for aerosol and decay-product studies in indoor environments

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