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극저온 LNG vaporizer에 대한 구조 건전성 평가
조종래(J.R. Cho),권정헌(J.H. Kwon),김창수(C.S. Kim),배찬효(C.H. Bae) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
The purpose of this study is to evaluate the integrity of LNG vaporizer. The LNG vaporizer is used to transfer the liquified natural gas which temperature is -196℃ and supplied pressure on purge mode is 5bar(0.5㎫). In the present work the temperature distribution and thermal stress are calculated by the finite element method. A commercial software(ANSYS 10.0) is used in the structural analysis for LNG vaporizer. In design condition calculated membrane, and membrane plus bending stress are lower than allowable stresses based on the ASME boiler and pressure vessel code. In operating condition the results are satisfied with the code limits.
조종래(J.R.Cho),정해영(H.Y.Jung),권진회(J.H.Kwon),최진호(J.H.Choi),조윤식(Y.S.Cho) 한국마린엔지니어링학회 2005 한국마린엔지니어링학회 학술대회 논문집 Vol.2005 No.-
The results of an experimental and analytical study of composite pressure hull on buckling pressure are presented for URN 300. We predicted the buckling and post buckling analysis of composite laminated cylindrical shell and panel under external compression by using ABAQUS/Standard[Ver 6.4]. To obtain nonlinear static equilibrium solutions for unstable problems, where the load-displacement response can exhibit the type of nonlinear buckling behavior, during periods of the response, the load and/or the displacement may decrease as the solution evolves, used the modified Riks method. Experiments were conducted to verify the validation of present analysis for cross-ply laminated shells. The shells considered in the study have four different lamination patterns, [±θ/0/90]<SUB>14s</SUB>,[±θ₁₄/0₁₄/90₁₄],[±45/0/90]<SUB>18s</SUB> and [/0/90]<SUB>18s</SUB>. At the result of this study, the optimized ply orientation angle is 75˚. The critical load from experiment is 69% of that of numerical analysis, because the fracture of matrix was generated before buckling. So URN 300 is not proper to use at the condition under high external pressure.
조종래(J.R. Cho),권정헌(J.H Kwon),김창수(C.S. Kim),배찬효(C.H. Bae),김현준(H.J. Kim) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.4
The purpose of this study is to evaluate the integrity of combined LNG vaporizer. The combined LNG vaporizer is used to transfer the liquified natural gas which temperature is -160℃ and supplied pressure on LNG vaporization mode is 4bar(0.4㎫). In the present work the temperature distribution and thermal stress are calculated by the finite element method. A commercial software(ANSYS 11.0) is used in the structural analysis for combined LNG vaporizer. In design condition, calculated membrane and membrane plus bending stress are lower than allowable stresses based on the ASME boiler and pressure vessel code. In operating condition the results are satisfied with the code limits.