한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제24권5호
  • /
  • Pages.520-526
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  • 2016
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  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
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브레이크 패드의 동적 불안정성에 따른 스퀼 소음 발생 원인의 실험적 연구

An Experimental Study on the Squeal Noise Generation due to Dynamic Instability of Brake Pad

  • 조상운 (상신브레이크 기술연구소) ;
  • 임병덕 (영남대학교 기계공학부)
  • 투고 : 2016.02.15
  • 심사 : 2016.06.08
  • 발행 : 2016.09.01
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초록

Squeal noise is a typical brake noise that is annoying to both passengers and pedestrians. Its frequency range is fairly wide from 1 kHz to 18 kHz, which can be distressful to people. The brake squeal noise occurs due to various mechanisms, such as the mode coupling of the brake system, self-excited vibration, unstable wear, and others. In this study, several parameters involved in the generation of a squeal noise are investigated experimentally by using a brake noise dynamometer. The speed, caliper pressure, torque, and friction coefficient are measured as functions of time on the dynamometer. The contact pressure and temperature distributions of the disc and the pad are also measured by using a thermal imaging camera and a pressure mapping system. As a result of the simultaneous measurement of the friction coefficient and squeal amplitude as functions of the velocity, it is found that the onset of the squeal may be predicted from the ${\mu}-v$ curve. It is also found that a non-uniform contact pressure causes instability and, in turn, a squeal. Based on the analysis results, design modifications of the pad are suggested for improved noise characteristics.

키워드

참고문헌

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피인용 문헌

  1. Analysis of Influence of Oil Pan Structure Modification on Radiation Noise of an Engine Using FEM vol.25, pp.5, 2017, https://doi.org/10.7467/KSAE.2017.25.5.573
  2. An Experimental Study on the Effect of Wear Type of Brake Friction Material on the Squeal Noise vol.25, pp.6, 2017, https://doi.org/10.7467/KSAE.2017.25.6.659