Euro-NCAP大腿伤害评价及性能提升

Femur injury assessing and performance improving according to the Euro-NCAP frontal impacting tests

为避免对大腿伤害的修正评价罚分,该文研究了大腿修正评价,归纳了Knee Mapping方法的评价流程。对某款车型的评价,是基于欧洲新车评价规程(Euro NCAP)中规定的正面碰撞试验中对假人大腿伤害的评价方法;设计了大腿伤害评价流程。针对可能造成大腿伤害的硬点——潜在风险点,用Knee mapping有限元方法,进行仿真优化分析。结果表明:通过仪表板内部结构预留足够的变形空间,并在组合开关下护罩内部,设计溃缩吸能结构,有效地降低了大腿伤害值。因此,优化后的方案,可满足Knee Mapping大腿受力要求,使得大腿部位免于罚分。

Femur injurie modifier assessments were investigated and Knee Mapping assessment procedure was summarized to avoid over-modifiers due to femur injuries. The performances of a vehicle were assessed according to the assessment method for femur protection in the front offset impact test in the Euro New Car Assessment Program （Euro NCAP）, and an evaluation process of femur injury was designed. Simulation optimize analysis was done by a Knee Mapping Finite Element method for femur injuries at some potential hard points （possible injuring femur）. The results show that the femur injuries are efficiently reduced by providing sufficient deformation space in the internal structure of instrument panel, and by designing energy absorbing structure with foam and metal sheet behind the cover. Therefore, the optimized method satisfies the femur force requirements of Knee Mapping and can avoid femur over-modifiers.