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이동하는 열탄성 보-평판의 진동에 대한 스펙트럴요소 해석
권경수(Kwon Kyung-Soo),조주용(Cho Joo-Yong),이우식(Lee U-Sik) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
The axially moving thin beam-plates exposed to sudden thermal loadings may experience severe vibrations through the thermal shock process. For accurate prediction of the thermal shock-induced vibrations, this paper develops a spectral element model for axially moving thermoelastic beam-plates. The spectral element model which is represented by spectral element matrix is formulated from the frequency-dependent dynamic shape functions which satisfy the governing equations in the frequency-domain. Thus, when compared with the classical finite element model in which simple polynomial functions are used as the shape functions, the spectral element model can provide exact solution by treating a whole uniform structure member as a single finite element, regardless of its length.
0-D 코드를 이용한 가솔린 내연기관의 성능 민감도 해석
최민욱(Min Wook Choi),김한상(Han-Sang Kim),이광익(Kwang Ik Lee),권경수(Kyung Soo Kwon) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
With the increasing worldwide concern on low quantity of energy resource and environmental problems, the technological innovation on IC engine for automotive use in terms of engine performance and efficiency is highly required among car makers. To meet these requirements, many engine-related geometric factors which influence on engine performance should be fully understood, In this research, the sensitivity analysis was carried out to assess the effects of many engine sub-parameters on engine performance. To this end, the conventional 4-stroke, 4-cylinder gasoline SI engine was modeled and its performance was simulated with varying engine sub-parameters, For the performance analysis of IC gasoline engine, AVL BOOST, the commercial engine cycle simulation code, is adopted. The effects of exhaust manifold runner length, exhaust port length, intake manifold runner diameter on engine performance are mainly presented.
校服 自律化에 따른 女高生의 衣服 選好에 關한 調査 硏究
權京洙 圓光大學校大學院 1983 學位 論叢 Vol.1 No.-
This study has been made in order to induce the high school & junior high school girl students to have the incentive dressing habits during the period of confusing on deciding adequate clothes after the liberation from the school uniforms. Goals of the study : 1. to gather the opinions of the students about the free style dressing, and analize them 2. to find out the methods of buying clothes. 3. to find out the tendencies of preferrences of the designs and colors of the clothes 4. to give aids to develope the rational and functional clothes. The result of the above study shows : 1. The students' general attitude on the free style dressing is rational. 2. Parents and society need not worry about the inducement of luxury, and evoking the feelings of confliction according to the prices of the clothes worn by students. 3. Free style dressing will help the students to enjoy the characteristic school lives and to express their personal beauties, and to grow. up as useful women to the society