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김효겸(H. G. Kim),박준홍(J. H. Park),김형준(H. J. Kim),제승봉(S. B. Jeh),김현수(H. S. Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.6
The performance of cooling tower is affected mainly by the thermal performance of cooling tower. The Design of existing fill became accomplished by the experience of designer. In this paper, designed the shape of new fill based on the shape of plate heat exchanger. A contrast of heat transfer performance is executed by numerical analysed. And fur new fills have been devised and their performance have been compared with those of existing fill to find shape.
이재섭(J-S Lee),김현수(H-S Kim),김형준(H-J Kim),박준홍(J-H Park),이성근(S-K Lee),김효겸(H-G Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
A scaffolding structure is a temporary framework of metal poles and planks, used as a working platform from which building repairs or construction can be carried out. The working platform is the structural element which keeps the feature where the thickness is very thin in different size. In this study, it is attempted to find out the shape of working platform using the finite element analysis, and it reduces production process. The design factors are thickness and area of the working platform. The commercial FEM program, ANSYS, was used for structural analysis for the shape. As a result of the shape design, stress value and deflection considering a safety factor were satisfied with CTEA(Construction Temporary Equipment Association of Korea) standard.
김현수,김효겸,박정호,김형준 東亞大學校附設 生産技術硏究所 2007 生産技術硏究所硏究論文集 Vol.12 No.-
Femur fracture is commonly caused by external impact. Generally. fracture care is made by surgical operation. When we care fractured bone. there are several surgical operation methods. Because of several reasons. recently, intramedullary nail is widely used for femur fracture. Intramedullary nail usage generates mechanical stress that forms callus on fracture area. Callus is made about 4 weeks later then fracture. Young's modulus and yield stress increase with time. After intramedullary nailing, femur must be endured usual bodyweight load like walking and stair climbing. But, it isn't possible to load total body weight as soon as operation. In case of bodyweight load at work in the femur compares to the strength with time on fracture symphysis area. It might be possible to walk normally and take the stairs after 8weeks.