EuroNCAP 정면충돌 승객거동해석 성능개선에 관한 연구

In Europe frontal NCAP tests of an Offset Deformable Barrier (ODB), frontal occupant kinematics are influenced by dynamic vehicle motion such as pitching and yawing. Therefore sled condition simulation, which is considered only axial motion, did not meet occupant simulation requirements to keep the relationship between vehicle motion and occupant behavior. However, this kind of motions can't be considered in a sled test. In order to verify the effect of the vehicle motions, the simulation model to include pitching and yawing motion, is proposed. The simulation results are compared with the full vehicle test results and sled test results. It showed that occupant injury values can be better correlated with the vehicle motion and sled test with axial motion could over predict dummy chest and head injury. From this research, realistic vehicle motion is applied in EuroNCAP frontal occupant simulation to improve occupant behavior and dummy reference assessment injury value. Reliable simulation is conducted using a Full FE model, excluding experimental factors. Also, an analysis of belt design parameter effect on chest deflection and dummy excursion will be presented.