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고정성 가공의치를 지지하는 임프란트의 길이에 따른 임플란트 주위 골조직에서의 응력분산에 관한 광탄성 연구
배형수,조성암,Bae Hyong-Su,Cho Sung-Am 대한치과보철학회 1992 대한치과보철학회지 Vol.30 No.4
The Present study was performed to evaluate the stress distribution patterns of bone tissues around two Branemark implant fixtures with varying lengths. Six models were used with the combination of 10mm, 7mm, 5mm Branemark implant fixture analogs. The load distribution characteristics of surrounding bone tissues were observed under 64kg vertical static loading on central part of fixed bridge using 2 dimensional photoelastic technique. Through observing the pattern of stress distribution around the implant fixtures, I got the results as follow : 1. Stress distribution pattern of model I(10mm, 10mm) was best among those of six models. 2. When two fixtures were in equal length, stress was increased in proportion to the reduction of implant surface area. 3. When two fixtures were in unequal length, stress was concentrated on the neck portion of the shorter one. 저자는 두개의 브로네마트 임플란트를 지대치로 하는 가공의치를 제작할 때 임플란트의 길이에 따른 임플란트 주위 조직의 응력분산양상을 평가하기 위하여 임플란트의 길이가 각각 10mm, 7mm, 5mm인 여섯가지의 실험모형을 제작하고 가공의치 중아부에 64kg의 수직하중을 가하여 2차원적 광탄성응력분석 실험을 행하여 비교 분석 해본 바, 다음과 같은 결론을 얻었다. 1. 여섯가지 실험모형 중 응력분산 양상은 실험모형 I (10mm, 10mm)일 경우가 가장 좋았다. 2. 근심과 원심에 같은 길이의 임플란트를 매식하였을 경우, 응력은 대체로 임플란트 표면적의 감소에 비례하여 증가하였다. 3. 근심과 원심에 다른 길이의 임플란트를 매식하였을 경우, 짧은 쪽 임플란트의 경부에 응력이 집중되었다.
의사결정지원을 위한 중역정보시스템(EIS) 구축방법 및 적용
배덕우,서의호,이주덕,손형수 한국경영과학회 1996 한국경영과학회 학술대회논문집 Vol.- No.1
The level of information provided by most current EIS systems is not above presentation and reporting. To maximize the effect of EIS, we must increase executives' use-rate. To do so, it is important to provide information really required by the user. In addition, the decision support functions should be provided for strategic decision making. In this paper we propose the methodology for adding the analysis and prediction functions to the EIS that is, for supporting the decision making with the system. Finally, we present a pilot system based on the proposed methodology.
인트라넷 환경하에서 중역정보시스템의 구축 및 적용에 관한 연구
이주덕,서의호,손형수,배덕우 한국경영과학회 1996 한국경영과학회 학술대회논문집 Vol.- No.2
Recently, it is very important to use internet in the business environment. Especially, Intranet means new concept of network environment which can help your enterprise quickly and efficiently incorporate web technology into your internal and external business processes. So, this paper is to propose an EIS development and application methodology on intranet environment.
안국영,김한석,안진혁,배형수,Ahn, Kook-Young,Kim, Han-Seok,Ahn, Jin-Hyuk,Pae, Hyoung-Su 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.10
The combustion characteristics have been investigated to develop the 50 kW-class gas turbine combustor. The combustor design program was developed and applied to design this combustor. The combustion air which has the temperature of 45, 200, $300^{\circ}C$ were supplied to combustor for elucidating the effect of inlet air temperature on CO, NOx emissions and flame temperature. The exit temperature and NO were increased and CO was decreased with increasing inlet air temperature. Also, the effect of equivalence ratio was considered to verify the combustor performance. The emissions of CO and NO with inlet air temperature can be analyzed qualitatively by measuring the temperature inside the combustor. The combustion performance with fuel schedule was evaluated to get the informations of the starting and part loading process of gas turbine. The combustion was stable above the equivalence ratio of 0.18. The pattern factor which is the important parameter of combustor performance was satisfied with the design criterion. Consequently the combustor was proved to meet the performance goal required for the target gas turbine system.
조승현,이동찬,황종영,김길주,장경욱,배대성,목형수,김창완 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.8
In this study, optimum design process to reduce a torque ripple was presented for an interior permanent magnet (IPM) type electric traction motor. Firstly, 2-D electromagnetic finite element analysis was conducted to analyze the characteristics of the torque ripple in a view of magnetic saturation as well as cogging torque. Then, design factors of stator shape and rotor shape affecting to the torque ripple was selected as design variables. Secondly, using selected design variables, sensitivity analysis was performed to select design variable more affecting to the torque ripple and output torque by using design of experiments method. Thirdly, radial based function meta-model was constructed based on the results of the design of experiments (DOE). Finally, the optimum design was performed by using the constructed meta-model and method of feasible direction. By using the presented optimum design process, it is confirmed that the torque ripple of the optimum design was reduced to compare with the initial design and that output torque performance of the optimum design was maintained.