Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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An Experimental Study on Placements and Thickness of Damping Material for Vibration Control of Automotive Roof

자동차 루프의 진동제어를 위한 제진재의 위치 및 두께에 대한 실험적 연구

  • Lee, Jeong-Kyun (Student, Graduate School of Automotive Engineering, Kookmin University) ;
  • Kim, Chan-Mook (Graduate School of Automotive Engineering, Kookmin University) ;
  • Sa, Jong-Sung (Dept. of Automotive Engineering Seoil College)
  • 이정균 (국민대학교 자동차공학전문대학원생) ;
  • 김찬묵 (국민대학교 자동차공학전문대학원) ;
  • 사종성 (서일대학 자동차과)
  • Published : 2005.11.01
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Abstract

This paper presents an experimental study on vibration characteristics of an automotive roof with damping material. The goal of the study is to extract modal parameters(natural frequency, loss factor, and mode shape) of automotive roof with damping materials treatment. To determine the effective positions and thickness of the damping material on a roof, vibration tests have been carried out for six cases; an aluminum plate with damping material on maximum strain energy positions, and an aluminum plate with damping material on nodal lines. From the result of aluminum plate, it is found that the damping material should be placed on the location with maximum strain energy part. For the automotive roof, patches of constrained damping material, which has two different density, have been attached to the positions of the maximum strain energy with four kinds of thicknesses. This paper shows that the proper positioning of the damping material is very important and the effective thickness is about twice that of the roof panel.

Keywords

References

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