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흡음에 의한 도시철도 곡선부 스퀼 소음저감에 관한 연구
최진권,이재원,장서일 한국소음진동공학회 2001 한국소음진동공학회 논문집 Vol.11 No.4
Sound absorbing materials are applied to the exposed surfaces of curvet subway tunnel for the reduction of curving noise level. Before the treatment, acoustical engineering simulation is performed to predict the noise level reduction for different kinds and amounts of absorbing material. The principle of geometrical acoustics is utilized to perform the simulation efficiently and accurately. The noise bevels of the inside and outside of running car body are measured to find the noise level reduction. The average noise level reduction of 8 dB has been attained. It has been shown that the simulated results are comparable to the measured ones.
최진권(Jinkwon Choi),김병우(Byeongwoo Kim),김대호(Daeho Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
This study is about analysis of Electric Motorcycle. The proper design is needed because the geographic setting of Korea is rugged and the motorcycle driver usually drives reckless. So, we simulated the electric system. First, understood the input parameters and organized the document. Next, we gained the parameters and analyzed the internal calculation logic. In the case of modeling the components, we especially tried to model the battery and the motor. Verify the result by comparing the simulation value and the prototype motorcycle. A result is similar and we will try the optimization.
DOE와 FEA를 이용한 측면에어백용 Inflator 용기 설계 최적화
최진권(Jinkwon Choi),김대호(Daeho Kim),김병우(Byeongwoo Kim),최성규(Sunggyu Choi) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Optimizing design using DOE and FEA for inflator vessel of a side airbag was conducted in this study. ABAQUS was used for FEA and Minitab was used for optimizing design by DOE and data analysis. Experiments were designed using Full Factorial Design among Factorial Design and Central Composite Design among Response Surface Methodology. Data involved in reactive factors was obtained by Static, Dynamic Implicit, Dynamic Explicit Analysis and Query function. The results of Full Factorial Design have relatively large errors as contrasted with results of FEA. In contrast, the results of Central Composite Design have relatively small errors so those are more appropriate for optimizing design on Inflator vessel of side airbag.