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조종래(Jong-Rae Cho),송상현(Sang-Hyun Song),전우진(Woo-Jin Jeon),박진성(Jin-Sung Park),정호승(Ho-Seung Jeong),김창수(Chang-Soo Kim),김현준(Hyun-Jun Kim) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10
The objective of this study is to estimate the thermo-mechanical performance of cross corrugated plate with geometrical parameters in plate heat exchanger. Solid element needs a lot of elements and requires longer computational time, whereas shell element and sub model require less number of elements and computational time. For this reason, development of analysis technique is required. Based on the analysis technique, parametric analysis was performed applying parameters as plate thickness, pitch/height ratio and intersection angles. By the parametric analysis, we understand the characteristics for corrugated plate. in plate heat exchanger.
조종래(Jong-Rae Cho),곽기열(Gi-Youl Kwak),정재헌(Jae-Hyun Jung) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
A cabinet of refrigerator is mainly composed of ASS copolymer, polyurethane(PU) foam and steel plate for insulation and support of structure. Outer plate is deformed in the circumference of duct which is interchanged between refrigerating room and freezing room as cold air stream and it is very difficult to prevent deformation because the reasons of deformation are not defined clearly. On this study finite element analysis of theoretical numerical analysis was applied to estimate deformation of cabinet and outer plate of duct region as constructing a finite element model and phenomenal analysis. The factors which affect deformation on outer plate of duct region were evaluated and the new design is also suggested to minimize deformation. It was suggested that the shape of flat duct which has rib at the end part of it can fill the empty space with PU-foam makes a smooth curved surface.
설계단계 적용을 위한 차량의 해체용이설계(DfD: Design for Disassembly) 통합시스템 개발
조종래(Jong Rae Cho),권재수(Jae Soo Kwon),홍병권(Byeong Kwon Hong),홍존희(John Hee Hong),권문식(Moon Sik Kwon) Korean Society for Precision Engineering 2007 한국정밀공학회지 Vol.24 No.8
In order to improve the recyclability and to reduce the recycling cost and time, the disassembly technology should be systemized because the worn out products can be reused or recycled after disassembly processes. This paper attempts to propose the integrated CATIA-based DfD (Design for Disassembly) support system to promote the disassemblability of products. The system is composed of two modules; evaluation of disassemblability, generation of DID alternatives. The disassemblability of current vehicle is evaluated to identify the weak point in terms of disassembly using the DELMIA and developed evaluation system. Furthermore a new expert system is developed to propose the optimal redesign rule and principle for generating the DfD alternatives. In order to generate the DfD alternatives, a CATIA-based design support system is implemented. The system can provide quick results and ensure consistency and completeness of the redesign alternatives.
조종래(Jong Rae Cho),정윤교(Yoon Gyo Jung) 한국생산제조학회 2006 한국생산제조학회지 Vol.15 No.1
The finishing process of die requires the processing technique of a height efficiency and precision. Because the precision of die gives the quality of goods the influence directly. The hydro-static polishing device employs the hydro-static axis and is able to polish the structure of complex picture under the constant pressure and is got constant surface roughness at all polished plane. Therefore, In order to polish precision sculptured surface, it was used the hydro-static polishing device. Polishing device's polishing characteristic is estimated by polishing conditions which are size of abrasive, material of tools. And, because the surface quality of workpiece depends on polishing pattern which relates to motion of abrasive grain. The polishing characteristic according to polishing pattern was evaluated.
조종래(Jong-Rae Cho) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.5
Nuclear power equipments are required the dynamic and sloshing analyses based on the earthquake spectrum and static analysis on normal loading including pressure and nozzle loading to verify the structural integrity of the equipment The structure was modeled using finite element techniques. Calculated stresses from finite element model are evaluated in accordance with design criteria of KEPIC MCN, 2000 or ASME B&PV code. In this paper, the special loading for equipment design and analysis examples are introduced.