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브레이크 패드 마찰재의 탄성 물성 측정을 이용한 NVH 해석
권성진(Seong-Jin Kwon),이동원(Dong-Won Lee),배철용(Chul-Yong Bae),이봉현(Bong-Hyun Lee),서병연(Byoung-Youn Seo) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The elastic properties of friction materials in brake pads are important design parameters because modulus variations may be significant in noise generation of automotive braking systems. In this paper, the elastic properties of friction materials have been investigated through the precise ultrasonic velocity measurements. By exploiting the fundamental relationship among sound speed in specific propagation directions and the elastic constants, the engineering constants, i.e. Young’s modulus, shear modulus, and Poisson’s ratio, have been determined. With the measured elastic constants and engineering constants, the vibration characteristic analysis based on finite elements method has been carried out to analyze the modal characteristics and the squeal noise characteristics of the target disc brake systes.