基于EuroNCAP V6．2行人保护小腿碰撞优化

为减小人车碰撞时对行人小腿的伤害，文章基于某车型E-NCAP星级性能提升，采用虚拟仿真与试验测试有效结合的方法，对失分点碰撞过程和失分原因进行分析，确定降低低速吸能盒刚度的优化方向。通过对该车型的优化，有效减轻了行人小腿伤害。优化后，胫骨加速度降低55．40％，膝部弯曲角度降低69．5％，膝部剪切位移降低3％，提升了该车型行人保护性能，为后续设计提供了参考。

Optimization on Protection of Pedestrian Lower Legform during Crash Based on E- NCAP V6.2

Aimed at decreasing the injury when the vehicle impacts on the leg of pedestrian, this paper introduces a method which presented the combination of simulation and test validation based on vehicle E-NCAP star rating improvement, analyzing the reason why decreasing score and describing the impact process, to confirm the optimization for reducing the rigidity of low- speed impact energy absorber. After the optimization on this vehicle, the injury fur pedestrian leg was effectively decreased. After optimization, tibia acceleration decreased by 55.4%, knee bending angle decreased by 69,5%, knee shearing displacement reduced by 3%, so that the performance on pedestrian protection was improved and will provide reference for the sequent design.