根据欧洲儿童乘员约束系统法规( ECE \R129) 要求，利用相关软件建立包括台车座椅、儿童座椅、儿童假人及安全带在内的碰撞有限元模型． 参照正面和后面碰撞实验工况，应用Ls-dyna 实施碰撞仿真分析，结果显示，碰撞过程中假人的运动形态、头部和胸部加速度与实验结果的一致性，说明该碰撞过程仿真分析方法是有效的． 最后，以侧面钢板替代侧面车门建立侧面碰撞有限元模型，仿真分析了儿童安全座椅的侧面碰撞性能，发现侧面碰撞时假人的头部和胸部加速度峰值均大于前、后碰撞的仿真值，说明了汽车儿童约束系统侧面碰撞法规制定和实施的必要性．

According to the requirements of European child restraint system regulations ( ECE \ R129) ,a finite element model considering a trolley seat,a child seat,a child dummy and a safety belt is established by using the related software.Then,the collision process is simulated and analyzed with Ls-dyna according to the conditions of the front and the rear crash experiments,finding that the movement patterns as well as the dummy's head and thorax accelerations in the collision process are consistent with the experimental ones,which means that the simulation model is effective.Finally,a finite element model to describe the side impact is built by introducing a side plate instead of the vehicle side doors,which is used to analyze the side impact situations of car child safety seat.The results show that the peak accelerations of dummy's head and chest in side impact situations are both greater than those in the front and rear crash situations,which means that it is necessary to develop and implement side impact regulations for automobile child restraint systems.