在行人-车辆碰撞事故中，行人因为没有保护空间而成为易受伤害群体，事故发生率极高。
In car to pedestrian accidents, pedestrian becomes to be vulnerable due to lacking of passenger protection space, and leads to high frequency.
因此，研究如何提高我国轿车的侧面碰撞安全性能，对减少对乘员伤害、降低车辆碰撞事故中的死亡率具有重大意义。
Therefore, researches on how to improve the car's side impact safety become very important for reducing passenger injury and the fatality rate in vehicle accident.
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