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경량/고강도 시트시스템 구축을 위한 전방충돌 해석의 적용
천병관(B.K.Chun),최재환(J.H.Choi),박관흠(K.H.Park) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
The seat system of a car must have the proper strength to ensure the safety of the occupant. Thus, the proper strength of a seat system should be determinated by using dynamic load which is applied at seat structure in cases of various impact conditions. During a front impact, seat system undergoes 2 type loads: One is pelvis pressure which causes submarining. the other is dynamic belt force at seat belt anchorage. In this paper, pelvis pressure and dynamic belt force are calculated by MADY1'vIO at 30mph Front Impact condition. The structural perfomances are analized by ABAQUS and then the design of Cushion support bracket is modified. Comparison with test results shows the validity of this application.
경량/고강도 시트시스템 구축을 위한 후방충돌 해석기술 개발
천병관(B.K.Chun),최재환(J.H.Choi),박관흠(K.H.Park) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
The Design of a car seat structure requires the weight and strength optimization. For the design optimization, the strength of a seat structure should be evaluated to ensure the safety of the occupant in cases of various impact conditions. This paper describes the backward bending strength prediction technique for a car front seat in order to simulate the rear impact<br/> situation. After investigating the performance of ominant components which affect the backward bending strength of a seat and then their characteristics were assumed to be numerical constraints in analysis model. Static back-moment and rear impact loading were applied to the model and analized by ABAQUS. Comparison with test results shows the validity of this<br/> technique.<br/>
이종원(J. W. Lee),조영호(Y. H. Cho),박관흠(K. H. Park) 한국자동차공학회 1983 오토저널 Vol.5 No.1
This paper presents structural analyses performed on the white body of vehicle using the most competitive analyzer, Finite Element Method, and attempts to obtain design criteria of body.<br/> By applying the substructure and restart technique to structural model, computation time is reduced.<br/> The synthetic processing from modelling to graphic visualization is accomplished by several subprograms, viz., various pre-post processors. On the basis of home-made vehicle modeling, typical cases of accident and service load is analyzed and discussed.<br/> The results obtained will guide the designer to design the structure optimally.
이종원(C.W.Lee),박윤식(Y. S. Park),박관흠(K.H.Park),조영호(Y. H. Cho) 한국자동차공학회 1983 오토저널 Vol.5 No.3
This paper discussed about Application Technique of Numerical Methods for large structure. The dynamic behaviours of a vehicle were investigated through finite element modelling. After dividing a vehicle body into three substructures, Basic Mass System was composed of 60 flexual modes which was obtained from the dynamic characteristics of each substructure using Modal Synthesis Method. Engine, transmission and rear axle, etc. Were added to Basic Mass Model, consequently Full Mass System was constructed by 72 degree of freedoms. Full Mass System was analyzed over the frequency range 0.5-50.0 Hz under the loading conditions which were Stationary Gaussian Random Process.<br/> Results and discussions provided the guidelines to eliminate resonances among the parts and to improve the Ride Quality. The Absorbed Power was used as a standard to determine the Ride Quality. The RMS value of driver's vertical acceleration was obtained 0.423g from the basic model and 0.415g from the modified model.
측면충돌시 최적의 PADDING 및 AIRBAG 설계를 위한 해석적 방법
이주영(J.Y.Lee),이인택(I.T.Lee),한성준(S.J.Han),박관흠(K.H.Park) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
Generally, there are two analysis tools in crash simulation, which are F.E.M code and Multi-Body Dynamics code. The analysis using F.E.M code needs much computing hours. The analysis using Multi-Body Dynamics code needs the experimental data of components. This study presents the coupling method to compensate the limitations of those analysis methods. Using the coupling method, the optimization is done in the padding and the side airbag system. MADYMO and PAM-CRASH are used in this study.<br/>