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Numerical and Experimental Analysis for Disc Brake Squeal Induced by Caliper Mode

캘리퍼 모드에 의한 디스크 브레이크 스퀼 시험 및 해석

  • Choi, Hoil (Div. of Mechanical and Automobile Engineering, Kongju Nat'l Univ.) ;
  • Kang, Jaeyoung (Div. of Mechanical and Automobile Engineering, Kongju Nat'l Univ.) ;
  • Gil, Hojong (Div. of Mechanical and Automobile Engineering, Kongju Nat'l Univ.)
  • 최호일 (공주대학교 기계자동차공학부) ;
  • 강재영 (공주대학교 기계자동차공학부) ;
  • 길호종 (공주대학교 기계자동차공학부)
  • Received : 2014.05.28
  • Accepted : 2014.08.25
  • Published : 2014.12.01

Abstract

This study numerically simulates brake squeal and validates it experimentally by using a lab-scaled brake dynamometer. The system frequencies of the disc brake are traced with respect to the brake pressure by using a modal test and FEM. Then, the squeal frequencies measured from the brake dynamometer are found to correspond to the brake system mode with the dominant displacement of the caliper and pad. Furthermore, a complex eigenvalue analysis conducted using the finite element model confirms that the caliper mode generating the rotational displacement of the pad becomes unstable owing to the negative friction-velocity slope.

Keywords

Frequency Response Function;Complex Eigenvalue Analysis;Brake Squeal;Friction Curve

Acknowledgement

Supported by : 한국연구재단

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