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[論文] 차실내 소음 개선을 위한 차음재 및 제진재의 효과적 적용
이정권(J.G.Ih),김인동(I.D.Kim),이영섭(Y.S.Lee) 한국자동차공학회 1992 오토저널 Vol.14 No.4
Vibration and vibro-acoustic characteristics of body panels enclosing the vehicle interior cabin are tested and analyzed for effective application of sound proofing materials. A set of deadener and insulation packages are proposed based on the experimentally evaluated and categorized contributions of noise radiating panels. The suggested packages are applied to a prototype vehicle. and a refined acoustic quality is achieved. A systematic experimental procedure proposed in this study can be a good tool in tuning the acoustic quality of prototype vehicles within a limited development period.
이정권(J.G.Ih) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_1
There is an increasing demand to predict the acoustic performance of exhaust silencing system in conceptual design stage for optimization purposes. The total exhaust system of modern passenger vehicles includes manifold, catalytic converter, pipings, mufflers, and the radiation into ambient. However, the acoustic analysis of the catalytic convener have been considered to be very difficult due to the viscothermal actions in the capillary tubes of the monolith. In this paper, a method for analyzing the viscothermal losses and acoustic impedance of the monolith of the catalytic converter is studied with consideration of the convective effect as well. The experimental results agree reasonably well with the predicted ones, thus validating the applicability to the practical systems of the present work.<br/>