Suppression of brake squeal noise applying finite element brake and pad model enhanced by spectral-based assurance criteria

Yi Dai, Teik C. Lim

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

An enhanced dynamic finite element (FE) model with friction coupling is applied to analyze the design of disc brake pad structure for squeal noise reduction. The FE model is built-up from the individual brake component representations. Its interfacial structural connections and boundary conditions are determined by correlating to a set of measured frequency response functions using a spectral-based assurance criterion. The proposed friction coupling formulation produces an asymmetric system stiffness matrix that yields a set of complex conjugate eigenvalues. The analysis shows that eigenvalues possessing positive real parts tend to produce unstable modes with the propensity towards the generation of squeal noise. Using a proposed lumped parameter model and eigenvalue sensitivity study, beneficial pad design changes can be identified and implemented in the detailed FE model to determine the potential improvements in the dynamic stability of the system. Also, a selected set of parametric studies is performed to evaluate numerous design concepts using the proposed dynamic FE model. The best pad design attained, which produces the least amount of squeal response, is finally validated by comparison to a set of actual vehicle test results.

Original languageEnglish (US)
Pages (from-to)196-214
Number of pages19
JournalApplied Acoustics
Volume69
Issue number3
DOIs
StatePublished - Mar 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Keywords

  • Brake pad design
  • Brake squeal
  • Finite element brake model
  • Spectral-based assurance criteria

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