Experimental and computational investigation of disc brake squeal

Ömer Anil Tozkoparan*, Hakan Yenerer, Osman Taha Sen, Sunay Gunes, Basaran Ozmen, Matthias Haack, Mehmet Ipekoglu, Frank Walther

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)


In this paper, the high frequency noise problem brake squeal observed in automotive disc brake systems is experimentally and computationally investigated. Firstly, modal testing on the components of the brake system (brake disc, brake pad, carrier, caliper) is performed and the corresponding natural frequencies and mode shapes are obtained. Secondly, computational models of the given components are built and normal mode analyses are executed. A good match between the experimental and computational results is obtained in terms of both frequencies and mode shapes. Thirdly, a computational model of the brake corner assembly is built with the validated component models. Squeal analysis is then performed for different speed and brake pressure levels by using complex eigenvalue analysis. Based on the results, speed and brake pressure values that have high squeal propensity are identified. Finally, a controlled laboratory experiment is designed and built for the squeal investigation. In the setup, only a single brake corner assembly excluding the suspension system is used. During the experiments, acceleration and sound pressure data are recorded. Experiments at different speed and hydraulic brake pressure levels are performed, and several squeals are successfully measured at the same levels as calculated with the computational model. In conclusion, a finite element method for brake squeal is developed and experimentally validated.

Original languageEnglish
Publication statusPublished - 2017
Event46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017 - Hong Kong, China
Duration: 27 Aug 201730 Aug 2017


Conference46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017
CityHong Kong

Bibliographical note

Publisher Copyright:
© 2017 Institute of Noise Control Engineering. All rights reserved.


  • Brake squeal
  • Finite element analysis
  • High frequency noise


Dive into the research topics of 'Experimental and computational investigation of disc brake squeal'. Together they form a unique fingerprint.

Cite this