Complex Mode Analysis on Disc Brake Squeal and Design Improvement

2009-01-2101

05/19/2009

Event
SAE 2009 Noise and Vibration Conference and Exhibition
Authors Abstract
Content
Squeal noise in vehicle disc brakes is perceived by comsumers as both annoying and warranty cost. The mechanism is considered a mode coupling phenomenon also referred to as coalescence. In this paper, the system eigenvalues have been computed using a technique based on the • nite element method in order to obtain the dynamical properties of the disc brake assembly. The simulated squeal results were compared with the brake noise test that was in accordance with SAE J2521 standard and showed good correlation for some squeal frequencies which indicated that the research on disc brake squeal using complex mode could predict squeal propensity of the disc brake. Among the methods that have been used to control squeal noise, increasing the system damping has been shown to be very effective. The most commonly used method to increase system damping consists of attaching multi-layer laminates on the back of the brake pads. The comparison squeal test between disc brake with damping shim and one without shim shows that with the damping layer, both the noise occurrence and sound pressure level are much lower in the frequency range between 1000∼18000Hz.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-2101
Pages
7
Citation
Jun, H., Xue-xun, G., and Gang-feng, T., "Complex Mode Analysis on Disc Brake Squeal and Design Improvement," SAE Technical Paper 2009-01-2101, 2009, https://doi.org/10.4271/2009-01-2101.
Additional Details
Publisher
Published
May 19, 2009
Product Code
2009-01-2101
Content Type
Technical Paper
Language
English