Published: 30 September 2012

Analytical framework for analyzing brake squeal noise using assumed-modes approach

Bashir Behjat1
Amir Afkar2
Ali Banan-Nojavani3
Amin Paykani4
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Abstract

Sometimes a loud noise or high pitched squeal occurs when the brakes are applied. It is generated during the braking phase and is characterized by a harmonic spectrum. Brake squeal is induced by self-excited vibrations, consequences of local nonlinearities at the contact interface. Many researchers have examined the problem with experimental, analytical, and computational techniques, but there is still no method to fully annihilate brake squeal. This paper deals with presentation of a new model to analyze the brake squeal behavior. In this paper, a lumped-continuous vibration model is presented for the braking system and nonlinear equations are obtained using the Hamilton’s principle. Then, the linearization of nonlinear equations is done around the equilibrium point of system and linear stability analysis is discussed. Furthermore, the effects of different braking parameters such as friction coefficient, rotational speed, pad stiffness, calipers etc. on the brake squeal noise are investigated.

About this article

Received
15 June 2012
Accepted
04 September 2012
Published
30 September 2012
Keywords
brake squeal
noise
assumed modes method
lumped-continuous model