Light duty automotive duplex drum brake squeal analysis using the finite element method

2021 ◽  
pp. 095440622110084
Author(s):  
AL Dias ◽  
RN Rodrigues ◽  
RA Bezerra ◽  
P Lamary ◽  
MHP Miranda
Keyword(s):  
Secondary Response ◽  
Brake Squeal ◽  
Noise Emission ◽  
Stability Parameters ◽  
Stick Slip ◽  
Drum Brake ◽  
Light Duty ◽  
Automotive Production ◽  
Warranty Costs ◽  
Squeal Noise

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.

Preventing Drum Brake Squeal through Lining Modifications

2013 ◽  
Vol 471 ◽  
pp. 20-24 ◽  
Author(s):  
Muhammad Ridhwan Abd Rahman ◽  
Gregory Vernin ◽  
Abd Rahim Abu Bakar
Keyword(s):  
Finite Element Method ◽  
Complex Eigenvalue ◽  
Frequency Range ◽  
Brake Squeal ◽  
Positive Real ◽  
Drum Brake ◽  
Warranty Costs ◽  
Squeal Noise ◽  
Brake Noise

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.

Light duty automotive drum brake squeal analysis using the finite-element method

2021 ◽  
pp. 146442072110359
Author(s):  
Anderson L Dias ◽  
Rômulo do N Rodrigues ◽  
Roberto de A Bezerra ◽  
Pierre Lamary ◽  
Matheus HP Miranda
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Friction Coefficient ◽  
Design Parameters ◽  
The Finite Element Method ◽  
Brake Squeal ◽  
Positive Real ◽  
Drum Brake ◽  
Light Duty ◽  
Element Method

The method presented in this work intends to analyze drum brake design parameters of a light duty automotive drum brake system. The main objective of this work is to correlate brake materials and unstability parameters to identify which condition will effectively reduce squeal propensity. The methodology involves (a) the finite-element method of the brake components, namely, drum, shoes, and frictional linings, (b) static calculations to get a pre-stress state around which (c) is computed the complex eigenvalues of the system. Hence, positive real parts indicate dynamic instabilities which are explored by varying parameters, namely, the modulus of elasticity of the materials and the friction coefficient at the contact of the shoes with the drum. According to calculations, it was observed that there exist a given range of values for Young’s modulus and friction coefficient that are favorable to reduce drum brake squeal occurrence. In addition, the method proposed delivered results that match with brake squeal literature.

A Study on Low-Frequency Brake Squeal Noise

1996 ◽  
Author(s):  
Ichiro Kido ◽  
Tuyoshi Kurahachi ◽  
Makoto Asai
Keyword(s):  
Low Frequency ◽  
Brake Squeal ◽  
Squeal Noise

Band Brake Squeal

1996 ◽  
Vol 118 (2) ◽  
pp. 190-197 ◽  
Author(s):  
M. Nakai ◽  
M. Yokoi
Keyword(s):  
Elastic Foundation ◽  
Frictional Force ◽  
Linear Analysis ◽  
Brake Squeal ◽  
Constant Frequency ◽  
Squeal Noise ◽  
Effective Treatments

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.

Analysis of Brake Squeal Noise using FEM Part II: Effect of Operating Parameters and Control Methods

2004 ◽  
Author(s):  
Mário Trichês ◽  
Samir N. Y. Gerges ◽  
Isabel da Silveira Lima ◽  
Marcelo Santos
Keyword(s):  
Operating Parameters ◽  
Control Methods ◽  
Brake Squeal ◽  
Squeal Noise ◽  
And Control
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