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정성재(S.J. Jeong),김용관(Y.K. Kim),김종규(J.K. Kim) 한국해양환경·에너지학회 2011 한국해양환경공학회 학술대회논문집 Vol.2011 No.11
거제도와 여수에 시설된 부유식 가두리 및 수하식 양식시설물의 안정성을 해석하기 위하여 해수유동조사와 CFD를 이용한 수치실험을 실시하였다. 그 결과, 현재 시설된 양식장의 경우 모든 극한상황의 외력을 견뎌내는 것을 확인할 수 있었다. The stability of culture facility examine the numerical experiments using a CFD with Flow-3D program based on the field flow observation in the Geoje and Yeosu. As a results, cage culture and hanging culture could be withstand external force at all the extreme conditions.
정성재(S.J. Jeong),이선봉(S.B. Lee),김동환(D.H. Kim),김병민(B.M. Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.4
IC(Integrated Circuit) lead frame is high precision product and many parameters influence on the dimensional accuracy. The development of lead frame is based on trial and error and the period of development takes a long time. To reduce the expenses of development, it needs to study about effect of parameters in lead deflection after blanking process. This paper investigates the effect of blanking order on lead shift using LS-DYNA. Several rules for blanking order of lead frame are proposed and it is verified by FE-simulation. The rule bases are used for decision 48TSOP's blanking order. The conventional and modified blanking order processes are simulated by LS-DYNA. The result of simulation is compared to experiment. Results of FE-simulation, modified blanking order is more improved in accuracy.