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주거용 건물 유형별 자연환기시스템의 최적 설계 및 해석
최경석(Gyeong-Seok Choi),정영선(Young-Sun Jeong),강재식(Jae-Sik Kang),이승언(Seung-Eon Lee),정영용(Yeong-Yong Jeong) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
On account of Indoor Air Quality(IAQ) deterioration by reason of high insulation and air tightness for energy saving, absence of energy efficiency ventilation system development that can be domestic existing window system, the cost increase and the energy addition loss by mechanical ventilation for IAQ improvement, the ventilation obligation making design standard was prepared by a social and technical background and the necessity. In this study, an optimized design and simulation Analysis of natural ventilation window system classfied by Apartment type was evaluated by CFD Computational analysis.
ANSYS를 이용한 EH36강 용접부의 잔류응력 해석에 관한 연구
이종석(Jong-Seok Lee),정영선(Yeong-Seon Jeong),김귀남(Gwi-Nam Kim),박준성(Joun-Sung Park),박원조(Won-Jo Park),허선철(Sun-Chul Huh) 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6
Today, a ship and structure are becoming larger (such as large structures, vessels, FPSO, etc.). So, weld material is required to high strength. Welding has advantages depending on the development of welding technology, such as ease of operation and the structures of simplification and the confidential excellence, etc. But it has occurred to shrinkage and deformation, because of the repeat of heating and cooling. Welding residual stress has an adverse effect on stability. Also, fatigue and brittle fracture of structures are closely related. In this study, Experimental and analytical methods were conducted. measured residual stress by using the AIS3000 and compare with the results of analysis by using the ANSYS simulation. Observed microstructure of metal surface at various positions of weld, HAZ, and base metal by using the optical microscope, EPMA. and Ingredients analyzes using XRD. Next compare with changes to the strength and weld residual stress.