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http://dx.doi.org/10.7467/KSAE.2014.22.7.016

Computational Study of Automotive Drum Brake Squeal  

Jung, Taeksu (Department of Mechanical Engineering, Graduate School, Inha University)
Cho, Chongdu (Department of Mechanical Engineering, Inha University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.22, no.7, 2014 , pp. 16-22 More about this Journal
Abstract
Automotive NVH on brake operation is mainly caused by a coupling action of vehicle speed and inter parts friction and its frequency occurs over a broad band of 0.1 kHz~10 kHz. Especially, squeal noise, being a self-excited vibration generated by friction force between drum and lining, occurs over 1 kHz and consequently dynamic instability is induced when friction energy is applied to a brake vibration system. The squeal strongly depends on nonlinear properties influenced by the material of lining, velocity of vehicle, and the dynamic properties of a brake system. The dynamic properties are considered as a main influential design factor to squeal noise, however the analysis of the properties are rarely facilitated due to arbitrariness of shape by wearing down. In this paper, we research generating tendency of squeal noise through complex eigenvalue analysis, tracking drum brake's unstable modes in accordance with the wear shape of drum and lining such as tapered and bellmouth shape, and analyze computed unstable modes by variable shapes.
Keywords
Drum brake; Squeal noise; Wear pattern; Complex eigenvalue; Computational analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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