不同类型约束系统对6岁儿童胸腹部损伤防护效果研究

Study on Protective Effects of Different Restraint Systems Against Thoracic and Abdominal Injuries in Six-Year-Old Children

依据ECE R129法规,采用已获取的台车试验加速度波形加载到6岁儿童人体有限元模型进行正面碰撞仿真,研究不同类型的约束系统对6岁儿童胸腹部损伤的防护效果。研究结果表明,尽管3种儿童安全座椅对胸腹部没有造成损伤,但从胸腹部压缩量、胸腹部VC值等损伤评价指标可以看出,自带五点式安全带儿童安全座椅对儿童胸腹部防护效果更好。进一步研究不同安全带材料对儿童胸腹部损伤防护的效果,发现不同安全带材料对儿童胸腹部内脏器官的最大第一主应变表现不同。

According to the ECE R129 regulations,the acceleration wave form obtained from the sled test was incorporated into a finite element model of a 6-year-old child for frontal collision simulation to study the protective effects of different restraint systems against the chest and abdominal injuries in 6-year-old children.The results show that the three types of child safety car seats did not cause damage to the chest and abdomen,and the evaluation of chest and abdominal compression,VC value,etc.indicates that with a 5-point harness the child’s abdomen area can be better protected.Further research reveals that the different seat belt materials lead to different maximum first principal strains of organs in children’s chest and abdomen.