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Investigation of Brake Squeal with Contact Stiffness Variation Using Experiment and FE Simulation

패드 접촉강성 변화에 따른 FE스퀼해석법 및 실험 검증

  • Park, Kiwan (Dept. of Mechanical Engineering, Kongju Nat'l Univ.) ;
  • Nam, Jaehyeon (Dept. of Mechanical Engineering, Kongju Nat'l Univ.) ;
  • Kang, Jaeyoung (Dept. of Mechanical Engineering, Kongju Nat'l Univ.)
  • 박기완 (공주대학교 기계자동차공학부) ;
  • 남재현 (공주대학교 기계자동차공학부) ;
  • 강재영 (공주대학교 기계자동차공학부)
  • Received : 2016.07.11
  • Accepted : 2017.02.08
  • Published : 2017.05.01

Abstract

In this study, squeal noise with respect to pressure variation is measured by a lab-scaled brake dynamometer and estimated by a complex finite element (FE) eigenvalue analysis. From the FE eigenvalue sensitivity analysis, unstable frequencies occur due to a mode-coupling mechanism and are found to change with variation in contact stiffness. In the experiment, squeal frequencies near 1 kHz, 2.5 kHz, 3.5 kHz, and 4 kHz are increased with pressure variation. The sensitivity of squeal modes to contact stiffness variation obtained from the FE analysis is shown to approximate the variation of squeal frequencies under pressure variation in the experiment.

Keywords

Squeal Noise;Contact Stiffness;Finite Element Method;Complex Eigenvalue Analysis

Acknowledgement

Supported by : 한국연구재단

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