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유럽 측면충돌 성능향상을 위한 차체 측면구조 대책과 해석
홍성오(S.O.HONG),홍석길(S.G.HONG),이익중(I.J.LEE) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
Since the European Experimental Vehicle Committee(EEVC) has proposed a new side impact procedure, car designers should consider improving crashworthness not only for the NHTSA side impact but also for the proposed EEVE side impact.<br/> This paper presents a computer simulation of passenger car structure and occupant in the European side impact. The simulation is done by LS-DYNA3D on Cray T-94 to calculate the deformation and movement of the structure and dummy injury criteria. The purpose of the analysis is to find ways of reducing the door and b-pillar velocities and deformations, as these data are related to dummy injury criteria. From the result we have proposed the effective structure modified for the European side impact.<br/>
음향전달함수(ATF)를 이용한 부밍 소음 취약부 예측 연구
황광현(K.H. Hwang),오혁진(H.J. Oh),최승찬(S.C. Choi),서진관(J.K. Suh),홍석길(S.G. Hong) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
The noise and vibration have been evaluated by using the finite element model in the vehicle developing stage. The sound pressure of the vehicle compartment is predicted by the acoustic cavity model coupled with the body structure. In general, the structural model has been focused to study in the improvement of the noise. It is not easy to treat the structural model, instead the acoustic cavity model is relatively simple and aids in root cause analysis of vibro-acoustic issues. Therefore, the acoustic transfer function of the cavity is more efficient for finding out the main contribution parts of the vehicle booming noise. And examples about the run-up booming noise demonstrate the validity of the AFT analysis for improving the vibro-acoustic sensitivity.