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유체로 연성되고 두께가 상이한 두 직사각 평판의 실험적 모드 해석
유계형,정경훈,이성철,Yoo, Gye-Hyoung,Jeong, Kyeong-Hoon,Lee, Seong-Cheol 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.12
In order to study the vibration characteristics of fluid-structure interaction problem, two rectangular plates coupled with bounded fluid were investigated. Experimental modal analyses were carried out to extract the modal parameters of the system. Additionally. finite element modal analyses performed using a commercial computer code, ANSYS. The FEM solutions were compared with the experimental solutions to verify the finite element model. As a result, the comparison between the experiment and FEM results showed excellent agreement. The transverse vibration modes, in-phase and out-of-phase, were observed alternately in the fluid-coupled system. The thickness effect of the plates on the fluid-coupled natural frequencies and mode shapes was investigated for two different cases with the identical thickness and the unequal thickness. It was found that the coupled natural frequencies increase with the thickness for the identical plates regardless of the mode phase. The experimental and the finite element analysis results showed that the out-of-phase mode shapes were deviated from the symmetrical mode shapes in the plate transverse direction fur the unequal plate thickness case.
연료전지자동차용 초경량 복합재료 탱크의 수소 충전 특성 연구
유계형(Gye-Hyoung Yoo),김종열(Jong-Lyul Kim),이택수(Taek-Su Lee),이중희(Joong-Hee Lee) 대한기계학회 2011 大韓機械學會論文集A Vol.35 No.7
본 연구에서는 연료전지자동차의 초경량 복합재료 수소 탱크에 대한 수소 충전 특성을 파악하고, 충전 조건에 따른 수소 탱크의 안전성을 확인하기 위해 플라스틱 라이너를 사용하는 Type 4 수소 탱크와 알루미늄 라이너를 사용하는 Type 3 수소 탱크에 대해 수소 충전 시, 수소 탱크 내부의 가스 온도 및 압력 변화, 라이너 및 복합재료 층의 온도 변화 등을 측정하여 그 특성을 고찰하였다. 그 결과 충전 속도가 증가함에 따라 탱크 내부 가스의 온도가 증가하였고, 탱크 내부 가스의 온도 분포가 다르게 나타났다. In this research, we investigated the hydrogen-gas filling characteristics of ultra-light composite tanks that have a plastic or aluminum liner inside the composite shell. The study was performed for different gas and tank temperatures. The temperature changes at various positions in the Type-4 tank during hydrogen-gas filling were monitored in order to understand the effects of the filling conditions. The results were compared with those obtained for a Type-3 tank. As the filling speed was increased, a quicker temperature rise was observed, and the temperature distribution over the entire region showed significant discrepancies.
연료전지자동차용 초경량 복합재료 탱크의 수소 충전 특성 연구
유계형(Gye-Hyoung Yoo),김종열(Jong-Lyul Kim),이택수(Taek-Su Lee),이중희(Joong-Hee Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In this research, the hydrogen gas filling characteristics of the ultra-light composite tanks that have a plastic liner or an aluminum liner inside the composite shell are investigated in terms of gas and tank temperatures. The temperature changes in various positions in the Type 4 tank during hydrogen gas filling were monitored to understand the effects of the filling conditions. The results was also compared with the results obtained with Type 3 tank. As the filling speed is raised, more stiff temperature rise was observed and the temperature distribution over the entire region became more discrepancy.
연료전지 차량용 고압기체수소 저장용기(Type4)개발(설계검증시험)
유계형(Yoo, Gye-Hyoung),주용선(Ju, Yong-Sun),허석봉(Heo, Seok-Bong),전상진(Jeon, Sang-Jin),김종열(Kim, Jong-Lyul),이중희(Lee, Jong-Hee) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
We developed and tested the high pressure hydrogen gas cylinder(type4) for fuel cell vehicle. The working pressure is 350bar. We conducted material tests, production tests and design qualification tests on the developed cylinders according to modified NGV2-2000(hydrogen). The high pressure hydrogen gas cylinder met all the design qualification requirements of ANSI/CSA NGV2-2000 and acquired NGV2 certification from independent inspection agency.