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LINCAP MDB에서 MADYMO Scaling 방법을 이용한 탑승객 상해 Correlation
노진성(Jinsung Rho),손창규(Changkyu Son),김동석(Dongseok Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The lateral crash analysis can be divided into two steps. The first step is a structure deformation phase by MDB (Moving Deformable Barrier) or the pole. The second step is a dummy interaction phase when a dummy contacts against a door trim and a side air bag. Occupant behavior and injury is affected more by the deformation and the impact velocity. The deformation and velocity data of the vehicle structure can be obtained from crash simulation. They can be transferred to as MADYMO input data. MADYMO can adjust the data to make dummy injury more correlated. In this case, to have a more correlated MADYMO model, PSM (Prescribed Structural Motion) data, which has the positions of all nodes at every time step, should be pertinently adjusted. Two methods are proposed in adjusting the structure behavior. One is to scale time of the structure intrusion, another is to scale displacement of the structure intrusion at every time step. These methods will help to reduce difference between physical test results and occupant CAE analysis results of dummy injury. This study shows better correlated injuries under US LINCAP Barrier conditions.
측면 충돌 시 MADYMO Scaling 방법을 이용한 탑승객 상해 Correlation
노진성(Jinsung Rho),손창규(Changkyu Son),김동석(Dongseok Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
CAE analysis for the safety performance of a vehicle has two parts. One part will be conducted by FE analysis such as a LSDYNA software, to develop the ability of a vehicle structure and another part will be pursued by occupant behavior analysis such as a MADYMO software which supports robust airbag models and dummy models to develop the performance to protect its occupants. Due to this separated procedures for the vehicle crash simulation, each procedure makes the most of its merit. In the case of the structural crash simulation, it will focus on the total deformation of vehicle structures and the deformation mode. However, occupant behavior analysis needs the more precise deforming velocity of vehicle structures to conduct its analysis successfully. In this case, to have a more correlated MADYMO model, PSM (Prescribed Structural Motion) data which has the position of all nodes at every time step should be pertinently adjusted. This method will help to have a better correlated MADYMO CAE model in improving the safety performance to protect occupants.
열 유속차를 이용한 수소저장합금 분말의 열전도도 측정 기법
김중배(Joong Bae Kim),노진성(Jinsung Rho),이봉재(Bong Jae Lee) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
This study proposes a technique for measuring the thermal conductivity of powdered metal hydride. The proposed technique was verified through numerical simulation and uncertainty analysis, and its applicability was evaluated by implementing it as an actual apparatus. In order to overcome the problems such as requiring a large amount of sample and long measuring time of the Guarded Hot Plate method, the scale of the device was drastically reduced, and feedback control was applied in this study. In addition, it contributed to increasing the repeatability of measurement by adopting a case that can accurately contain powder samples in the repeated measurements. As a result, it got to be possible to precisely measure the effective thermal conductivity of metal hydrides using the proposed technique.