基于柔性腿型的某轿车前端结构优化研究

Structural Optimization of a Car's Front Section Based on Flexible Leg

文章以开发某款轿车车型为例,根据设定的行人保护开发目标,该车型需满足ECE-R127法规。建立该车型的行人保护仿真模型,结果膝部韧带伸长量超标。分析车辆前端结构和碰撞动画后,针对膝部韧带伸长量超标情况制定了优化方案。研究结果表明,优化前端上中下支撑件后降低了膝部韧带伸长量MCL,该车能够满足ECE-R127法规要求。

Taking the development of a sedan car model as an example,according to the set pedestrian protection develop-ment goal,the vehicle type needs to meet ECE-R127 regulations.The pedestrian protection simulation model of the vehicle was established,and the results showed that the knee ligament elongation exceeded the standard.After analyzing the front-end structure of the vehicle and the collision animation,the optimization scheme is formulated according to the situation that the knee ligament elongation exceeds the standard.The results show that the MCL of knee ligament elongation is reduced after optimizing the upper,middle and lower supports of the front end,and the vehicle can meet the requirements of ECE-R 127 regulation.