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승객 거동 해석을 통한 퓨즈 형태 벨트(Fuse-type belt)의 효과 분석
이상헌(S.H. Lee),김동석(D.S. Kim),박재건(J.K. Park),이명식(M.S. Lee) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
FE approach using reliable Finite Element(FE) dummy mode] had several strong aspects over Rigid-Body dynamic approach in occupant simulation. Rigid body dynamic approach requirs Force-Displcement(F-D) information between impacting dummy and planes of vehicle structure and component tests are essential to get that kind of information. But in FE approach, material properties are only needed. So FE approach is very convenient at the first stage of design when the test data are not available. In this study, occupant simulation was done by using commercial FE program, PAM-SAFE, in order to know the effect of fuse-type belt on occupant injury reduction. A fuse is installed at lap belt. The result showed 13% reduction of HIC with this type of belt.<br/> <br/>
김동석(D. S. Kim),이명식(M. S. Lee) 한국자동차공학회 1997 한국 자동차공학회논문집 Vol.5 No.4
In order to reduce passenger injuries in side collisions, car makers are developing a side impact airbag system while . Volvo has already adopted. This study examines dummy injury reduction effect of a side airbag system using full car side impact simulation according to FMVSS 214 test procedure. The simulation result without side mrbag shows a good correlation with test data. The folded airbag simulation is carried out to check main design factors. Through the simulation with side airag module integrated in the seat frame, it is found that the side airbag system provides a substantially enhanced protection for car occupants in side collisions.<br/>
김동현(D.H.Kim),이재인(J.-I.Lee),노상길(S.-K.Roh),이명식(M.-S.Lee) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_2
Numerical simulation of automotive defrost duct and nozzle was performed to guide a design recommendation. The geometry shape of defrost duct was modified to optimize the aerodynamic performance and the flow split. Newly in the present study, windshield flow simulation in passenger compartment was carried out with and without external guide vane of nozzle on instrument panel. For practical design purposes, under the various injection angle of nozzle flow, the behaviour of velocity-magnitude patterns at a distance of 4 to 9mm from the glass surface was analysed to understand the de-icing of windshield.<br/>
임홍재(H.J.Yim),이호용(H.Y.Lee),최동운(D.U.Choi),박재건(J.K.Park),권성은(S.Y.Koun),이명식(M.S.Lee) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_2
A section analysis and design program named SECOPT has been developed to compute cross section properties of general thin-walled open, close, single, or multi-cellular sections. SECOPT, a program developed especially to help designers of vehicle structures where non-standard geometrical shape of beam section are encountered. The program integrates optimization of beam section with automatic calculations and satisfaction of constraints on section properties. The section optimization function of SECOPT provides with the ability to design minimum weight sections that meet a specified set of constrains on moment of inertias and torsional constant.<br/>
실험계획법과 CAE를 이용한 도아씨일(Door Seal) 설계
엄정기(J.G. Eom),김동석(D.S. Kim),박재건(J.K. Park),이명식(M.S. Lee) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
Sealings between doors and vehicle body are essential to keep airtightness of vehicle compartment and to cut off outside noise, rain and dust. They are usually made of expanded rubber and deform similar to cork whose poisson's ratio is nearly zero. Therefore hyperform material model is used for analysis. Simulation is done by using ABAQUS. In order to confirm this material model, simple tension test and door seal compression test are performed<br/> and the results are compared with simulation and they showed good agreement. Finally, design parameter study is performed using Taguchi method to find optimal seal design of reduced reaction force. The change of thickness and material strength of door seal of window frame is the most effective in reducing reaction force.<br/> <br/>
김희관(H. K. Kim),유홍희(H. H. Yoo),최경록(K. R. Choi),이명식(M. S. Lee) 한국자동차공학회 1998 한국 자동차공학회논문집 Vol.6 No.6
A graphic user interface program for the design of vehicle suspension system is developed in this work. Graphic templates are designed by using a graphic language and a library and given to users for interactive data input. Several suspension types are graphically given, and the information of hard points can be directly provided on the graphic templates by users. The information is saved in a data structure which can be efficiently accessed, and traninto another data format. The data transformation is for the interface to an analyzer by which suspension design characteristics can be calculated.<br/>