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차량 운동에 따른 극저온 액화수소 저장 탱크의 유탄성 특성 해석
차종국(Jong-kook Cha),조진래(Jin-Rae Cho) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
The hydroelastic characteristics of the ultra-low temperature liquefied hydrogen storage tank are investigated to four major vehicle motion conditions. Excitations caused by vehicle motions are obtained by ADAMS, and the interaction between the structure motion and the hydrogen flow is treated by the Euler-Lagrange coupling method.
전역-국부 해석기법에 의한 LNG 운반선 화물창의 쇄빙충격 응답해석
차종국(Jong-Kook Cha),김정환(Jeong-Hwan Kim),최주형(Joo-Hyoung Choi),김도정(Do-Jeong Kim),박제웅(Je-Woong Park) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
The containment system of LNG carrier is a typical large-scale structure system. When LNG ship is breaking ice. The structural stability of this system may become serious. therefore, The evaluation of structural stability is prerequisite. So far. there have been large amount of researches to numerically solve this large-scale structure system problems. but these traditional numerical methods require very fine mesh to achieve the reasonable numerical accuracy. Consequently, the numerical analysis for the long-period time response with the desired numerical accuracy is extremely time-consuming. The aim of this study is to introduce a new method to analyze of ice-impact of the insulation containment of LNG carrier by using the global-local numerical approach. The efficiency of this method is demonstrated by presenting that the long-period local responses of cargo systems can be obtained within relatively short CPU time.
차종국(Jong-Kook Cha),최주형(Joo-Hyoung Choi),김정환(Jeong-Hwan Kim),황태규(Tae-Gyu Hwang),김성준(Sung-Joon Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
This paper is bush stress analysis of rudder shaft bearings. The bush can not be assembled with housing at normal temperature. Because outer diameter of bush is greater than inner diameter of housing. The interference area is consisted of 0.1%, 0.2% and 0.3% of outer diameter of bush. The cryogenic bush is assembled with the housing by contraction.