基于THUMS数字人体模型的大倾角座椅正面碰撞乘员损伤分析

Damage Analysis of Occupant in Front Collision of High Tilt Seat Based on THUMS Digital Human Body Model

基于某大倾角座椅,利用THUMS数字人体模型,研究了座椅后倾姿态正面碰撞条件下的乘员损伤特征,并讨论了乘员损伤机理。研究结果表明,相较于常规坐姿,一方面大倾角座椅后倾姿态下传统约束系统无法实现乘员的有效约束,乘员易发生下潜而造成腹部、胸部、颈部的损伤风险,另一方面由于座椅的作用,乘员脊柱受到较大的轴向加速度载荷,存在损伤风险。最后,基于乘员的损伤特征及机理,进一步讨论了后倾姿态下乘员保护策略。

Based on THUMS digital human model,this paper studied the occupant injury characteristics of rear attitude frontal collision in a large tilt seat and discussed the mechanism of occupant injury.As the result shows,compared with regular sitting posture,on the one hand,the traditional restraint system cannot realize the effective restraint on the occupant under the reclining posture,which easily causes injury of occupant’s abdomen,thorax and neck due to descending of occupant.On the other hand,the occupant’s spine is subjected to a large axial acceleration load,and there is a risk of injury due to the seat cushion.Finally,based on the characteristics and mechanism of occupant injury,the paper also discussed the strategies on occupant protection in a large seat.