Abstract
Since nowadays the NVH performance of vehicles has become an important priority, the noise radiating from brakes is considered a source of considerable passenger discomfort and dissatisfaction. Creep groan and squeal that show up with annoying vibrations and noise in specific frequency ranges are typical examples of self-excited brake vibrations caused by the stick-slip effect, the former, by the mode coupling of brake disc and friction pads or calliper, the latter. In both cases, the friction coefficient, which depends, among other factors, on the morphology of the mating surfaces and on the operating conditions, is a fundamental parameter but not the only one for the occurrence of the vibratory phenomena.Finite element complex eigenvalue parametric analyses were performed on a disc brake assembly to evaluate propensity to dynamic instability of brakes with multiple pads, as in railway brakes, as a function of the number of pads, pad shape and size, and material parameters.
Highlights
Since the beginning of its history the automotive industry has experienced a progressive increase of the standards on comfort of vehicles
In an effort to reduce the divergence of classification, the Society of Automotive Engineering (SAE) edited the standard SAE J2786 [4] that offers a wide and comprehensive classification
Most unstable points are still within the frequency zone of low squeal for all models, there are some points of model 1 and 2 that are outside this frequency zone
Summary
This content has been downloaded from IOPscience. Ser. 744 012239 (http://iopscience.iop.org/1742-6596/744/1/012239) View the table of contents for this issue, or go to the journal homepage for more. Please note that terms and conditions apply. You may be interested in: Parametric study on the performance of automotive MR shock absorbers J Godasz and S Dzierek Parametric Study on Arc Behavior of Magnetically Diffused Arc Chen Tang, Li Hui, Bai Bing et al Parametric study on numerical simulation of the electromagnetic forming of DP780 steel workpiece with aluminium driver sheet Hyeonil Park, Jinwoo Lee, Se-Jong Kim et al Parametric Studies on the Laser-Diode-Pumped, Thermal-Lensing-Compensated, Mode-Locked, Q-Switched Nd:YAG Laser Masato Ohmi, Kenta Naito, Koji Ishikawa et al A parametric study of laser induced ablation–oxidation on porous silicon surfaces Luca De Stefano, Ilaria Rea, M Arcangela Nigro et al Computational Plasmadynamics applied to parametric studies L Bilbao
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