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판넬 기여도 해석을 이용한 승용차 실내 소음 분석 기법에 관한 연구
진용선(Yongsun Jin),김찬묵(Chanmook Kim),고강호(Kangho Ko),허승진(Seungjin Heo),국형석(Hyungseok kook),사종성(Jongsung Sa) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper. the panel contribution analysis is used to identify the noise contribution of each sub-panel of car body to the total radiated noise. The accelerations of panels are measured in the normal direction on the outer surface of car body during operation. Acoustic transfer function, which has great influence on the panel contribution, is experimentally measured. In this procedure, volume acceleration of loudspeaker is defined by the application of equivalent area and a manifestation of the vibro-acoustical reciprocity. The panel contribution method is validated by comparing the radiated interior noise with the calculated radiated noises from each sub-panel. Contribution of panels for interior noise is ranked and problematic sub-panels of the car can be re-designed or reinforced according to the results.
엔진 소음저감용 플라스틱 소재 개발 및 실린더 헤드 커버 디자인 최적화
진용선(YongSun(Steven) Jin),김현준(HyunJun Kim),오광호(Kwangho Oh),Xu Han,Neal Hu 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
The main contribution of this paper is to employ design optimization and higher damping material in order to improve the NVH performance of thermoplastic engine cylinder head cover. When redesigning parts for light weight, by changing from metal to plastic, the proposed design gives NVH issues due to differences in mass, stiffness and damping. The engineering design concept of robust design and material selection for improvement of NVH performance of the engine cylinder head cover is to optimize the vibration characteristics based on principle test and simulation such as correlation between test and FE analysis, vibration & noise analysis and to adopt material with higher damping factor at vehicle operating temperature. Also, this paper introduces the optimization methods based on ERP(equivalent sound radiation power) analysis.
지역별 주행환경을 고려한 흡기호스 내열수명 예측에 관한 연구
정현수(Hyunsoo Jung),박종민(Jongmin Park),김영해(Younghae Kim),진용선(Yongsun Jin) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
Recently, regulations on the environment and fuel efficiency of automobiles have been tightened. The global automotive industry is trying to reduce the weight while expanding the turbocharger engine in response to this regulation. The turbocharger is inevitably hot because it uses exhaust gases to pump the air required for engine combustion. Therefore, for hoses fitted to the turbocharger inlet and outlet, the heat resistance performance of air intake hose is paramount. This paper predicted the thermal life of the air intake hose fitted to the turbocharger inlet based on Arrhenius equation, warranty and regional environment.