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PGSFR중간열교환기의 정상상태 고온 구조 건전성 평가
이성현,구경회,김성균,Lee, Seong-Hyeon,Koo, Gyeong-Hoi,Kim, Sung-Kyun 한국압력기기공학회 2016 한국압력기기공학회 논문집 Vol.12 No.1
Four cylindrically shaped IHXs(Intermediate Heat Exchangers) are installed in the PHTS(Primary Heat Transfer System) of the PGSFR(Prototype Gen IV Sodium cooled Fast Reactor). As for the IHX, the temperature difference of structure is inevitable result caused by heat transfer between primary coolant sodium and IHTS(Intermediate Heat Transport System) sodium. It is necessary to evaluate the high temperature structural integrity of IHXs which operate at the elevated temperature condition over the creep temperature. In this paper, the high temperature structural integrity of IHX under assumed loading conditions has been reviewed according to ASME code.
이성현(Lee, Seong-Hyeon),정의봉(Jeong, Weui-Bong),서영수(Seo, Young-Soo) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.10
A method for the vibration analysis of curved beam conveying fluid with uniform velocity was presented. The dynamics of curved beam is based on the inextensible theory. Both in-plane motion and out-of-plane motion of curved beam were discussed. The finite element method was formulated to solve the governing equations. The natural frequencies calculated by the presented method were compared with those by analytical solution, straight beam theories and Nastran. As the velocity of fluid becomes larger, the results by straight beam model became different from those by curved beam model. And it was shown that the curved beam element should be used to predict the critical velocity of fluid exactly. The influence of fluid velocity on the frequency response function was also discussed.
이성현(Seong-Hyeon Lee),이종원(Jong-Won Lee) 한국컴퓨터정보학회 2020 한국컴퓨터정보학회 학술발표논문집 Vol.28 No.2
모바일 게임 시장에서 많은 게임들이 출시되고 있는 가운데 2D를 기반으로 한 게임들이 많이 출시가 되고는 있다. 하지만 과도한 성적 노출을 기반으로 한 게임이 늘고 있으며 기존 몇몇 게임마저 기존 유저를 만족시키기 위한 방법 중 하나로도 쓰이고 있는 상황이다. 본 논문에선 2D 남성향 모바일 게임들의 과도한 성적 표현을 지양하고 성공한 게임이 무엇이 있는지 알아보고, 게임들의 특징을 분석하고 그를 토대로 2D 남성향 게임의 성공 전략을 제시하고자 한다.