Abstract
A two degree-of-freedom model of a drum brake system is developed to investigate the criteria for unstable condition under friction-induced vibration instability mechanisms of both flutter instability and negative friction-velocity instability. This model considers the drum as the main component that is subjected to the friction-induced vibration. The influences of the friction coefficient, normal load, sliding velocity, contact stiffness, damping coefficient and the location of centre of pressure on the shoes on the instability of the system are investigated using transient analysis. The results indicate that the minimal model displays all the characteristics of the unstable system comparable to the previously published experimental and finite element modeling results.
About this article
Received
10 February 2011
Accepted
15 May 2011
Published
30 June 2011
Keywords
minimal model
self-excited friction induced vibration
drum brake squeal
flutter instability
negative damping
Copyright © 2011 Vibroengineering
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