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首页> 外文会议>FISITA World Automotive Congress >AN ASSESSMENT OF INFLUENCE OF BONNET DESIGN TOPEDESTRIAN HEAD IMPACT PROTECTION
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AN ASSESSMENT OF INFLUENCE OF BONNET DESIGN TOPEDESTRIAN HEAD IMPACT PROTECTION

机译：引擎盖设计对梯形头部冲击保护的影响评估

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In vehicle-pedestrian impact, the majority of pedestrian fatalities are caused byhead injuries. Accident analysis showed that bonnet of car often had consequences with severehead injuries in accidents involving young pedestrians. Important factor involving risk of headinjury is design of bonnet structure, often supported by underlying reinforcement and engine baystructures. Design of those structures has the potential to reduce the severity of the resulting headinjuriesThis work takes a closer look at pedestrian head impact mechanics and protection, whenimpacting with compact passenger car. Discussion of influence of chosen passive and activepedestrian restraint systems to impact responses of impacting pedestrian body is aim of thestudy. The influence of the active bonnet as representative of active restraint systems and bonnetstructure modifications as representative of passive restraint systems is investigated andcompared with help of mathematical modeling.Both simulations of dummy – vehicle collision and headform impact test ware carried out,impact responses ware measured and according to injury criteria the relevant influence of activerestraint system to injury risks was discussed. While the headform test was simulated and HIC,stopping distance and peak force ware assessed on different points of bonnet when influence ofbonnet structure design was investigated. The bonnet consisted of two parts: skin and under-skinstructure. Both parts of bonnet were modified for purpose of this study. The modifications ofsub-skin frame ware designed to provide better support of bonnet skin at those points where limitvalues of criterions ware exceed. Polyurethane foam or was considered when bonnet skin wasmodified. All modifications ware subject of headform test simulations.
机译：在行人碰撞中，大多数行人死亡是头部受伤造成的。事故分析表明，在涉及年轻行人的事故中，汽车引擎盖经常造成严重的头部受伤。涉及头部受伤风险的重要因素是发动机罩结构的设计，发动机罩结构通常由下层的加强件和发动机托架结构支撑。这些结构的设计有可能减少产生的头部伤害的严重性。这项工作将对紧凑型乘用车撞击时行人头部的撞击机理和防护进行仔细研究。本研究的目的是讨论选择的被动和主动行人约束系统对撞击行人身体的撞击响应的影响。在数学建模的帮助下，研究并比较了以主动式引擎盖为代表的主动约束系统和以引擎盖结构修改为代表的被动约束系统的影响。进行了虚拟-车辆碰撞和头部冲击测试器的仿真，测量了冲击响应器，根据伤害准则，探讨了主动约束系统对伤害风险的影响。在模拟头模测试和HIC的情况下，研究了发动机罩结构设计的影响时，在发动机罩的不同点评估了制动距离和峰值力。阀盖由两部分组成：皮肤和皮肤下结构。为了本研究的目的，对发动机罩的两个部分进行了修改。皮下框架商品的修改旨在在标准商品的极限值超出的那些点上为引擎盖皮肤提供更好的支持。聚氨酯泡沫或引擎盖蒙皮被修改时被考虑。所有修改都将模拟头模测试主题。

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