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김명준,오종한,조순호,최기봉,조철호,Kim, Myung-Jun,Oh, Jong-Han,Cho, Soon-Ho,Choi, Ki-Bong,Cho, Chul-Ho 한국구조물진단유지관리공학회 1998 한국구조물진단유지관리공학회 논문집 Vol.2 No.2
Compared to normal-strength concrete, high-strength concrete has the lower lateral expansion capacity caused by the higher elastic modulus and the lower internal crack characteristic. Therefore, the effect of the lateral confining action of hoops appears slowly. Nevertheless, it has been reported that the strength and deformation capacity of high-strength concrete is improved by well-distributed hoops. Due to that argument, this investigation has been compared and analyzed by the experimental works on the deformation capacity and the confinement mechanism of high-strength concrete shear wall of the high-rise building reinforced by rectangular steel tubes and rectangular hoops at both edges. It is suggested that, using high-strength concrete($500kgf/cm^2$, $700kgf/cm^2$), hoops should be replaced with rectangular steel tubes in order to prevent closely spaced hoops at the edge of the shear wall.
주행모드 및 운전자, 환경변수에 따른 SOC, EV/HEV 가변제어
김정은(Jeongeun Kim),오종한(Jonghan Oh),어정수(Jeongsu Eo) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Recently, in accordance with the increased interest of consumer in fuel efficiency due to the phenomenon of high oil price, complaints against actual fuel efficiency in the road in comparison with the certified fuel efficiency have been raised frequently. Especially in case of the hybrid vehicle which is highly popular for the reason of its high fuel efficiency compared with that of existing gasoline car, deviation in the fuel efficiency will be higher compared with that of gasoline car in accordance with the driving mode (downtown/highway), propensity of driver (wild/mild) and external environmental condition (gradient/temperature/altitude). To solve them, this paper developed a method so that the SOC (state of charge), EV/HEV transition point can be controlled variably in accordance with the driving mode, propensity of driver and external environmental condition by making the most of characteristics of hybrid. Through it, efficient engine operating point could be secured even in the driving situation under severe condition while maintaining a fixed SOC value, and it was verified that there are effects of increases in the average fuel efficiency and reduction of deviation in the fuel efficiency (about 2.5 kpl, 10~20%) through HILS (hardware-in-the-loop-simulation) validation. Application of this developed logic to 12 MY YF/TF hybrid vehicles has been completed.
병렬형 하이브리드 자동차의 엔진 동력을 이용한 발진 주행 동적 해석 모델 개발 및 엔진 클러치 제어
서호원(Howon Seo),김기영(Kiyoung Kim),임원식(Wonsik Lim),차석원(Suk Won Cha),정석민(Seokmin Jeong),오종한(Jonghan Oh) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
When a traction motor of a parallel type HEV(Hybrid Electric Vehicle) could not generate torque to launch, the HEV should start only with engine power. Because the engine rotates with idle speed the relative rotational speed of clutch input and output shaft starts from engine idle speed and ends to zero when clutches engaged. In this study a method for control pressure command of engine clutch is proposed to satisfy desired clutch engagement time and decrease shock. A dynamic model of a parallel type HEV powertrain (including hydraulic clutch control components) is constructed to validate the method proposed.
吳鍾漢 단국대학교 1984 論文集 Vol.18 No.-
Predominant power of match is only not dependent upon the inborn physical conditions or postnatal abilities. We can see some cases of superiority in the physical abilities in spite of inferiority in the physical conditions. We, therefore, believe that we can develop the physical abilities postnatally in opposition to the innate conditions. If the coefficient of correlation on the physical aptitude and general physical abilities is marked high, we can avail it for the way of excavation by measuring each side of it and need to make it clear. For the purpose of making it clear-subcutaneous fat, flexjbility of body, stimulus reaction of physical movement and muscles of the back, etc. I measured general physical abilities of primary school boys through C.H.McColy's I.O.W.A. Brace Test and compared them one another. The resuits of analyzing them make us confirm that physical aptitude and physical abilities are defferent, that physical abilities are flexable, that relation of stimulus reaction of physical movement and physical abilities and not be estimated so simply and that the stimulus reaction of physical movement is not based on the innate physical conditions.