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조상순(Sang Soon Cho),이장원(Jang-Won Lee),김동옥(Dong-Ok Kim),김태완(Tae-Wan Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
SMART has been developed as an environment-friendly reactor that gives freshwater from the sea as well as electric power. This paper presents the modal analysis prior to evaluating the structural safety against the seismic load. A finite element model of the reactor vessel and the internal structures has been simplified and a modal analysis has been performed using ANSYS. The simplified model is composed of beam elements for the reactor vessel and lumped-mass elements for the internal structures.
새로운 Tension Split Hopkinson Bar를 이용한 박판의 고속 인장시험
강우종,조상순,허훈,정동택,Kang, Woo-Jong,Cho, Sang-Soon,Huh, Hoon,Jung, Dong-Taek 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.12
A split hopkinson bar could be used for obtaining the high strain rate material properties of sheet metals for an autobody. In high speed tensile tests of sheet matals, a new design of a tension split Hopkinson bar apparatus is needed. The design of grips and an anvil length are numerically analyzed with ABAQUS/Explicit for the new apparatus of split Hopkinson bars. From the experiments with the new apparatus, the material properties of SPCEN in the high strain rate state have been acquired and compared with quasi-static experimental results. The material properties of SPCEN as well as other sheet metals in an autobody are indispensible for the analysis of crashworthness. Nevertheless the experiment of sheet metal in the high strain rate state has not been done or reported.
스마트원자로 노심지지배럴집합체 축소모형의 등가동특성 모델
이장원(Jang Won Lee),조상순(Sang Soon Cho),김동옥(DongOk Kim),박진석(Jin Seok Park),이원재(Won Jae Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Korea Atomic Energy Research Institute develops the SMART (System integrated Modular Advanced ReacTor), an environment-friendly nuclear reactor for the generation of electricity and the desalination. SMART reactors could be exposed to various external and internal loads caused by seismic and coolant flows. In this study, the research is investigated for dynamic characteristics in reactor internal, Core Support Barrel Assembly(CSB). The simplified scaled model of CSB is designed for the modal testing and 3D Solid model is built. finally, Equivalent dynamic model is developed using the verified 3D Solid model. In this procedure, the variables of SDC(Shear Deflection Coefficient), Young's modulus, Spring coefficient is considered, and Equivalent dynamic model is updated for accuracy by optimization method which is kind of a sub-problem method.
Tension Split Hopkinson bar를 이용한 자동차 성형용 금속 박판의 고속인장 시험
강우종(Woo-Jong Kang),조상순(Sang-Soon Cho),허훈(Hoon Huh),정동택(Dong-Taek Jung) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
A split Hopkinson bar could be used for obtaining high strain rate material properties of sheet metals for an autobody. In high speed tensile test of sheet metals, a new tension split Hopkinson bar is needed. From the experiments with the new apparatus, the material properties of SPCEN, SPCC, SPRC in the high strain rate state have been acquired and compared with quasi-static experimental results. The experimental results are used to obtain the constants of Johnson-Cook constitutive relation.<br/>
초기응력을 고려한 SMART 원자로의 정상운전하중 해석
정재한(Jae Han Jeong),조상순(Sang Soon Cho),김동옥(Dong-Ok Kim),김태완(Tae-Wan Kim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.4
The purpose of this study is to develop a finite element analysis model to assess the structural safety of SMART under normal operating conditions. The normal operating analyses should consider not only the deadweight due to the gravity, but also the distribution of pressure and temperature given from the reactor safety analyses. FE model have adopted the axisymmetric FE model since the whole structure of SMART is too complicated to be modeled as 3D solid one. The FE analysis is performed by using the general purpose finite element code ANSYS. This paper deals with the analysis of the deadweight to validate the confidence of the FE model developed for the normal operation analysis. Finally, this paper shows the evaluation results of the accuracy of the developed axisymmetric FE model by comparing the analysis result with the real mass of SMART.