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基于轿车的车车角度碰撞约束系统优化研究
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Study on Optimization of Restraint System in Oblique Crash under Car to Car Collision
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    摘要:

    为探究车车角度碰撞下的乘员约束系统参数设计准则,建立了某紧凑型车30°车车角度碰撞有限元模型和MADYMO驾驶区约束系统模型,并对整车模型及约束系统模型进行了验证.对安全带、安全气囊、安全座椅等约束系统各参数进行了灵敏度分析,运用MODEFRONTIER软件对目标车和同伴车约束系统参数进行优化.结果显示,在30°角度碰撞工况中,安全带D环位置及带扣点/锚点位置两个参数对驾驶员头部和胸部损伤影响显著,同时带扣点/锚点位置还对大腿轴向力有着显著的影响,而安全气囊点火时刻、气囊气体质量流率及泄气孔面积、安全带预紧器点火时刻4个参数对目标车和同伴车驾驶员各部位损伤影响都较为显著.优化后,目标车和同伴车WIC值分别减小了33.7%、7.4%,从而使此车型的约束系统在30°角度碰撞中对目标车和同伴车驾驶员的保护效果都达到最好.

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    This study aimed at exploring the design guidelines of restraints system parameters for occupants in oblique crash under car to car collision. The full car finite element model of a compact car was used to conduct the 30° oblique impact, and the model of occupant restraint system in the driving area were established and validated. The sensitive analysis of restraint system parameters to the driver in target car and driving car was then carried out. These parameters included seat belt parameters, airbag parameters and safety seat parameters. Furthermore, restraint system parameters were optimized according to these sensitive injury parameters. It is showed that the driver’s head and chest injuries are sensitive to the locations of D-ring, anchor and buckle in the 30° oblique crash. Meanwhile, the femur forces are sensitive to the locations of anchor and buckle. Further, the driver injuries in both the target car and driving car are sensitive to airbag fire time, pretensioner fire time, airbag holes areas and mass flow rate of the airbag. After the optimization, the injury index WIC of driver of target car is induced by 33.7% and that of the driver of driving car is induced by 7.4%. The optimization results make the protecting effect of the restraint system for drivers both in target car and in driving car to be optimized.

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颜凌波,解文娜,曹立波,刘亚飞,戴宏亮.基于轿车的车车角度碰撞约束系统优化研究[J].湖南大学学报:自然科学版,2018,45(4):10~17

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  • 在线发布日期: 2018-04-26
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