Improvement in Drum-Brake Squeal Noise Prediction by Including the Effect of Brake-Liner Wear

2021 ◽  
Author(s):  
Suneel Kumar Sharma ◽  
Amol Apte
2013 ◽  
Vol 471 ◽  
pp. 20-24 ◽  
Author(s):  
Muhammad Ridhwan Abd Rahman ◽  
Gregory Vernin ◽  
Abd Rahim Abu Bakar

Drum brake squeal is one of the most common and annoying types of brake noise and it usually falls in the frequency range between 0.5-16 kHz. Brake squeal continues to confront vehicle manufacturers where it not only leads to significant increase in the warranty costs but also may affect customers perception on quality of the vehicle. Thus this paper attempts to prevent drum brake squeal by means of lining modifications. In doing so, finite element method is first employed and squeal noise will be then predicted using complex eigenvalue (CE) analysis. A good lining modification should be able to stabilize the drum brake assembly by shifting or reducing positive real parts toward zero or negative real parts in the eigenvalue analysis. Finally, laboratory squeal tests are conducted on the four proposed modifications to verify its effectiveness against squeal.


Author(s):  
AL Dias ◽  
RN Rodrigues ◽  
RA Bezerra ◽  
P Lamary ◽  
MHP Miranda

The brake system creation is an important achievement for automotive production. However there is a secondary response of this system, its noise emission. Brake noise researches started in 1920’s and since then several causes were identified. In addition, many kinds of noises, their frequency range and characteristics were detected. Between these, the squeal is the noise that most concerns the automotive industry by reason of high warranty costs and environmental impact. The squeal noise occurs as a result of three mechanisms that are the stick-slip, the sprag-slip and the modal coupling and these are connected to material parameters of the brake components. This paper proposes a correlation between material and stability parameters of a light duty automotive duplex drum brake to indicate the influence of this on brake squeal. The results suggest that friction coefficient is the most influential parameter and its restrain does make possible to maintain squeal level under emissions regulations.


1996 ◽  
Author(s):  
Ichiro Kido ◽  
Tuyoshi Kurahachi ◽  
Makoto Asai

1996 ◽  
Vol 118 (2) ◽  
pp. 190-197 ◽  
Author(s):  
M. Nakai ◽  
M. Yokoi

The purpose of this paper is to investigate the squealing mechanism of band brakes in order to develop effective treatments for the reduction or elimination of squeal noise. With increasing rotational drum speed, squeal frequency increases up to a constant frequency. This constant squeal frequency coincides precisely with the frequency of instability obtained by a linear analysis of the motion of a band on an elastic foundation when the frictional force between the lining of the band and the drum is taken into account. Through experiments and analyses, it will be demonstrated that squeals are induced by the coupling between two modes of the band.


2004 ◽  
Author(s):  
Mário Trichês ◽  
Samir N. Y. Gerges ◽  
Isabel da Silveira Lima ◽  
Marcelo Santos

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