The effect of interface modifications combination of multiple friction blocks on truck brake squeal

2021 ◽  
pp. 1-10
Author(s):  
Y.K. Wu ◽  
C. Lu ◽  
J.B. Yin ◽  
Y.G. Micheale ◽  
Q. Wang ◽  
...  
Keyword(s):  
Brake Squeal

Tribological and dynamical analysis of a brake pad with multiple blocks for a high-speed train

2019 ◽  
Vol 234 (11) ◽  
pp. 1771-1788
Author(s):  
YK Wu ◽  
JL Mo ◽  
B Tang ◽  
JW Xu ◽  
B Huang ◽  
...  
Keyword(s):  
High Speed ◽  
Wear Behavior ◽  
Dynamical Analysis ◽  
Brake Disc ◽  
Brake Pad ◽  
High Speed Train ◽  
Brake Squeal ◽  
Element Analysis ◽  
Single Block ◽  
Middle Ring

In this research, the tribological and dynamical characteristics of a brake pad with multiple blocks are investigated using experimental and numerical methods. A dynamometer with a multiblock brake pad configuration on a brake disc is developed and a series of drag-type tests are conducted to study the brake squeal and wear behavior of a high-speed train brake system. Finite element analysis is performed to derive physical explanations for the observed experimental phenomena. The experimental and numerical results show that the rotational speed and braking force have important influences on the brake squeal; the trends of the multiblock and single-block systems are different. In the multiblock brake pad, the different blocks exhibit significantly different magnitudes of contact stresses and vibration accelerations. The blocks located in the inner and outer rings have higher vibration acceleration amplitudes and stronger vibration energies than the blocks located in the middle ring.

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

scholarly journals Numerical methods for parametric model reduction in the simulation of disk brake squeal

2016 ◽  
Vol 96 (12) ◽  
pp. 1388-1405 ◽  
Author(s):  
Nils Gräbner ◽  
Volker Mehrmann ◽  
Sarosh Quraishi ◽  
Christian Schröder ◽  
Utz von Wagner
Keyword(s):  
Numerical Methods ◽  
Model Reduction ◽  
Parametric Model ◽  
Brake Squeal ◽  
Disk Brake

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.

Uncertainty and Sensitivity Analysis of Different Models of Brake Squeal

PAMM ◽  
2014 ◽  
Vol 14 (1) ◽  
pp. 277-278 ◽  
Author(s):  
Andreas Hanselowski ◽  
Michael Hanss
Keyword(s):  
Sensitivity Analysis ◽  
Brake Squeal ◽  
Uncertainty And Sensitivity Analysis

Minimal models for disk brake squeal

2007 ◽  
Vol 302 (3) ◽  
pp. 527-539 ◽  
Author(s):  
Utz von Wagner ◽  
Daniel Hochlenert ◽  
Peter Hagedorn
Keyword(s):  
Minimal Models ◽  
Brake Squeal ◽  
Disk Brake

Brake Squeal Analysis by Finite Elements and Comparisons to Dyno Results

1999 ◽  
Author(s):  
W. V. Nack
Keyword(s):  
Friction Coefficient ◽  
Finite Elements ◽  
Stiffness Matrix ◽  
Approximate Analysis ◽  
Stability Evaluation ◽  
Analysis Method ◽  
Brake Squeal ◽  
Complex Modes ◽  
Baseline Solution ◽  
Test Schedule

Abstract An approximate analysis method for brake squeal is presented. Using MSC/NASTRAN a geometric nonlinear solution is run using a friction stiffness matrix to model the contact between the pad and rotor. The friction coefficient can be pressure dependent. Next, linearized complex modes are found where the interface is set in a slip condition. Since the entire interface is set sliding, it produces the maximum friction work possible during the vibration. It is a conservative measure for stability evaluation. An averaged friction coefficient is measured and used during squeal. Dynamically unstable modes are found during squeal. They are due to friction coupling of neighboring modes. When these modes are decoupled, they are stabilized and squeal is eliminated. Good correlation with experimental results is shown. It will be shown that the complex modes baseline solution is insensitive to the type of variations in pressure and velocity that occur in a test schedule. This is due to the conservative nature of the approximation. Convective mass effects have not been included.

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

What Kind of Friction Model Is Needed to Predict Brake Squeal?

2012 ◽  
Author(s):  
Tore Butlin ◽  
Jim Woodhouse
Keyword(s):  
Large Scale ◽  
Dynamic Properties ◽  
Theoretical Work ◽  
Friction Model ◽  
Coupled Systems ◽  
Brake Squeal ◽  
Model Framework ◽  
Wide Range ◽  
Pin On Disc ◽  
Almost All

Predictive models of friction-induced vibration have proved elusive despite decades of research. There are many mechanisms that can cause brake squeal; friction coupled systems can be highly sensitive to small perturbations; and the dynamic properties of friction at the contact zone seem to be poorly understood. This paper describes experimental and theoretical work aimed at identifying the key ingredients of a predictive model. A large-scale experiment was carried out to identify squeal initiations using a pin-on-disc test rig: approximately 30,000 squeal initiations were recorded, covering a very wide range of frequencies. The theoretical model allows for completely general linear systems coupled at a single sliding point by friction: squeal is predicted using a linearised stability analysis. Results will be presented that show that almost all observed squeal events can be predicted within this model framework, but that some subsets require innovative friction modelling: predictions are highly dependent on the particular choice of friction model and its associated parameters.

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