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Full Transient Dynamic Analysis를 이용한 함정용 대형 전동기의 내충격성 평가
이성욱(S. W. Lee),송승관(S. G. Song),김진(J. Kim),빈재구(J. G. Bin),권기영(K. Y. Kweon) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.11
This study was carried out to evaluate the shock-proof of a large scale motor for the naval vessel using full transient dynamic analysis. Finite element models for main assemblies (motor frame, rotor and stator assembly) were consisted of the tetrahedral solid elements and the equipments which installed in the upper side of the motor were substituted the mass elements. And we also modelled resilient mounts of a motor using the beam elements with appropriate directional stiffness. The analysis was conducted applying directional triple half triangle shock wave to the motor using ANSYS 11. As a result, we could find the motor to satisfy the design criteria of the maximum stress and deformation.
용융탄산염 연료전지용 금속분리판의 굽힘변형에 관한 연구
이성욱(S. U. Lee),성대용(D. Y. Seong),이창환(C. H. Lee),양동열(D. Y. Yang),강동우(D. W. Kang),이태원(T. W. Lee) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
The electrolyte matrix (MEA) of MCFC is used for electronic insulation and ionic communication between electrodes. Due to the weak mechanical strength of ceramic materials, the matrix is easy to crack when the cells are moved and stacked. In this study, bonding between the shield slot plate and the electrode is used to prevent the crack. Bonding reduces the deflection of MCFC cells, bending behavior in particular. The small deflection of matrix is derived from the bonded structure of MCFC cells. Under 3-point bending test with the bonded structures, it is shown that the bonded structure is strong against bending. Bonding between the shield slot plate and the electrode is necessary to prevent the crack of the matrix.
풍동실험을 이용한 관절형 컨테이너 크레인의 구조 안정성 해석
이성욱(S. W. Lee),심재준(J. J. Shim),한근조(G. J. Han),김태형(T. H. Kim) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
This study was carried out to analyze the effect of wind load on the structural stability of a 50ton articulation type container crane using wind tunnel test and provide a container crane designer with data which can be used in a wind resistance design of an articulation type container crane assuming that a wind load 75㎧ wind velocity is applied in an articulation type container crane. Data acquisition conditions for this experiment were established in accordance with the similarity. The scale of an articulation type container crane dimension, wind velocity and time were chosen as 1/200, 1/13.3 and 1/15. And this experiment was implemented in an Eiffel type atmospheric boundary layer wind tunnel with 11.52㎡ cross-section area. Each directional drag and overturning moment coefficients were investigated and uplift forces at each supporting point due to the wind load were analyzed.