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Step-time 개념과 전달경로분석법을 이용한 법규 소음 소음원 기여율분석 및 개발
김기성(Kisung Kim),이세진(Sejin Lee),강화익(Hwaik Kang),안상도(Sangdo Ahn),조영환(Younghwan Cho) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
In case of pass-by-noise test the distance between noise source and response is changing because the source and response are separated. Step-time concept is introduced to correct the time-varying acoustic transfer function for airborne noise transfer path analysis. In this study, contribution of noise source was pinpointed and noise reduction is confirmed by reduction source level.
임동화(DongHwa Lim),이태훈(TaeHoon Lee),임승민(SengMin Lim),안상도(SangDo Ahn),이춘근(ChunGeun Lee) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
A commercial semi-bonnet vehicle has a problem of low speed booming and vibration which is caused by rear suspension natural mode of differential nod and axle bending. This paper classifies the problem and suggests for countermeasure in view of source, transfer path and response.