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RISS 인기검색어
- 검색키워드
- 저자 : 김채주(C. J. Kim) (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
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김채주(C. J. Kim),김경욱(K. U. Kim),신범수(B. S. Shin) 한국자동차공학회 1995 한국 자동차공학회논문집 Vol.3 No.4
A mathematical model was developed for the simulation of ground pressure distribution of tracked vehicles under given terrain conditions. The contact line of track with ground was assumed sinusoidal and the total length of track unchanged during its motion. Force equilibrium was also applied for the modeling. A set of equations derived from the conditions of track curvature, length constraint and force equillibrium was computer programmed and solved numerically for the computer simulation. Results of the simulation were presented graphically together with values of maximum sinkage, nominal ground pressure and maximum mean pressure. Verification of the model was made by comparing the maximum mean pressure. Verification of the model was made by comparing the maximum mean pressures simulated by the model with those data published in the journal. A reasonable agreement was observed between the two values, from which it was considered that the model can be utilized with a reasonable accuracy to theoretically analyze the effects of track parameters on vehicle performance.
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궤도의 초기 장력이 궤도 차량의 견인 성능에 미치는 영향
김채주(C. J. Kim),김경욱(K. U. Kim) 한국자동차공학회 1997 한국 자동차공학회논문집 Vol.5 No.2
A computer program was developed to simulate effect of the initial track tension on the tractive performance of tracked vehicles. The performance was evaluated in terms of drawbar pull, motion resistance, tractive coefficient and tractive efficiency. Results of the simulation showed that inin track tension decreases the sinkage and mean maximum pressure in clay, making the ground pressure distribution more uniform. This tendency became more evident when the number of roadwheels increased. However, such change in MMPs was negligible in firm soils. Motion resistance was also decreased with increase in track tension and the number of roadwheels. Under weak soil conditions, tractive coefficient and efficiency increased generally as the track tension infor a slip range of 1O~30%. For slippage less than 3~4%, however, the tractive coeffidecreased with increase in track tension. In general, it was known that increasing track ten sion improves tractive performance in weak soil conditions. However, high track tension can reo duce efficiency due to the increment of internal motion resistance caused by increased track tension<br/>
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궤도형 로외차량의 주향 및 견인 성능 예측 컴퓨터 시뮬레이션
김경욱(K.U.Kim),신범수(H.Shin),김채주(C.J.Kim) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
An integrated computer simulation program was developed to predict mobility and tractive performance of tracked off-road vehicle. Input variables for the simulation involve the parameters about soil conditions and vehicle with engine/transmission characteristics. The simulation predicts soil thrust and motion resistance for the tractive performance index. For the mobility index, the simulation predicts a time-distance and time-speed relationship, maximum speed and whether go or no go for a given vehicle.<br/> A typical simulation result showed that M60AI Tank was not able to move on Hope Valley snow due to the greater motion resistance than the tractive force. It also showed that M60AI Tank could move at the maximum speed of 48 km/h on Clay soil and traveled 750 m in 70 seconds after starting.<br/>
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궤도의 초기 장력이 궤도형 주행 장치의 접지압 분포에 미치는 영향
김경욱(K.U.Kim),김채주(C.J.Kim),신범수(B.Shin) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
On the most conditions, the ground pressure distribution under the track is nonuniform. It has a form of peak pressure under each road wheel in contact with a ground. The variations of ground pressure distribution occur when the initial track tension varies. Finding out the relation between the ground pressure distribution and the initial track tension enables one to improve the tracked vehicles. The simulation of the ground pressure distribution was developed to describe the effects of initial track tension on the ground pressure distribution. Increasing the inital track tension on the clayey soil, MMP(maximum mean pressure) decreased exponetially. As the spaces of the roadwheels were narrow, the effects of the initial track tension were shown to be little.<br/>
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궤도형 로외차량의 주행 및 견인 성능 예측 컴퓨터 시뮬레이션
김경욱(K. U. Kim),신범수(B. S. Shin),김채주(C. J. Kim) 한국자동차공학회 1994 한국 자동차공학회논문집 Vol.2 No.3
A computer program was developed for the simulation of mobility and tractive performance of tracked off-road vehicles. Input parameters for the simulation involve those characterizing track and power drive line of a vehicle and soil conditions upon which the vehicle operates. The simulation predicts tractive performance in terms of soil thrust and motion resistance of track device and mobility performance in terms of the maximum speed, time-distance and time-speed relations that a vehicle can obtain under the given soil conditions. It also determines whether or not the vehicle can move in those conditions.<br/> An example of performing simulation was presented and its results showed that the performance prediction was reasonably in a good agreement with the published data.<br/>
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