http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
수수의 옥수수대찬 및 메티오닌 , 라이신의 첨가가 육계의 능력에 미치는 영향
김광석,한인규,하종규,곽종형 ( K . S . Kim,I . K . Han,J . K . Ha,C . H . Kwack ) 한국축산학회 1986 한국축산학회지 Vol.28 No.11
This experiment was conducted to examine the effect of substituting sorghum grain for corn, and methionine and lysine supplementation on the chick performances. Two hundred and eighty male broiler chicks were divided into 28 groups of 10 birds. Substitution levels of sorghum grain for corn were 0% (diet 1), 40%(diet 2 and 3), 60%(diet 4 and 5), and 80%(diet 6 and 7) of corn. The basis of supplementing limiting amino acids (methionine and lysine) was to meet the level of chick`s requirements. There were no significant differences in weight gain among groups. Adding sorghum grain to the diet increased (p$lt;0.05) feed intake. However, no differences in feed intake were observed among sorghum grain fed groups. Increased feed intake by chicks fed sorghum grains may have been caused by lower energy density of sorghum grain. Feed efficiency of diet 1 (no sorghum diet) was significantly (p$lt;0.05) better than those of other dietary groups, which probably can be explained by the lower energy density in sorghum grain. The effect of amino acid supplementation to the sorghum diets was not prominent in the present study.
차량동역학 해석 프로그램 AUTODYN7의 롤안정바 모듈 개발
김광석(K.S.Kim),유완석(W.S.Yoo) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
The Roll Stabilizer Bar(RSB) is an essential part in the suspension system to reduce the roll motion in vehicle maneuver. This paper presents a mathematical RSB model. A J-turn simulation was performed with the proposed RSB model, and the results are compared to those of the ADAMS program.<br/>
차량동역학해석 프로그램 AUTODYN7의 승차감 평가 모듈 개발에 관한 연구
김광석(K.S.Kim),유완석(W.S.Yoo) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
The purpose of this paper is to review several standards for evaluating ride quality. This paper also recommends for the effective use of such criteria in vehicle/component development. All proposed ride quality criteria are implimented as a ride quality evaluation module in the AUTODYN7 program
김광석(K. S. Kim),유완석(W. S. Yoo) 한국자동차공학회 1997 한국 자동차공학회논문집 Vol.5 No.1
To analyze ride quality and to predict durability in vehicle dynamics, it is essential to describe a road surface profile precisely. This paper presents a technique to generate road surface profiles in a spatial domain by using a power spectral density function. A single track power spectral density function is porposed to describe a road surface profile, which is also applicable for multi-track vehicle response analysis. The derived road surfaces are compared to ISO(International Organization for Standardization) standards and classifications porposed by the MIRA (Motor Industry Research Association). The methodology in this paper is also proposed to generate road roughness description with a limited external data. A small amount of external cunte data is combined with an internal PSD function to generate road surface roughness in a spatial domain.
김광석(K.S.kim),유완석(W.S.Yoo),이기호(K.H.Lee),김기태(K.T.Kim) 한국자동차공학회 1996 한국 자동차공학회논문집 Vol.4 No.2
Dynamic analysis of a three-axle heavy truck is carried out with rigid body model and flexible body model. To see the effects of chassis flexibility, the chassis is modeled as flexible body. The mass matrix, stiffness matrix, and vibration normal modes of the chassis are obtained by a finite element analysis program, and four vibration normal modes are used in the flexible body model. The vehicle model consisting of a frame, a cab, suspensions, an engine, a deck, a seat, and tires, has total 77 degrees of freedom. The result shows that the peaked acceleration in the flexible model is lower than that of the rigid body model.
차량동역학 해석을 위한 겹판스프링의 힘요소 모델링 기법 개발에 관한 연구
김광석(K. S. Kim),이정우(J. W. Lee),유완석(W. S. Yoo) 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.1
Leaf springs are widely used as a major suspension component in many commercial vehicles. Since friction is present between leaves, these elements have complicate nonlinear characteristics such as a hysteresis behavior, higher stiffness for small deflection behavior. Thus, the modeling technique of a leaf spring is one of the most difficult problems in vehicle suspension modeling.<br/> This paper concentrates on the mathematical modeling of leaf spring force using its shape and material properties. The shape of a leaf spring, stiffness matrix, and hysteresis data obtained from experimental test are required. The developed leaf spring force models are implemented as a leaf spring module in the AUTODYN7 program.<br/>