平头车变长头车以保护行人头部损伤的方法及效能研究

Method,effect and influencing factors of changing flat-headed vehicles into long-headed ones to protect pedestrian head against injuries

为提升平头车保护人体头部损伤的能力和法规上的接受水平,通过推导车头伸出长度公式而给出一种使平头车变长头车的方法,随后通过理论和仿真分析研究所提方法的损伤防护效果及摩擦因数、车速和行人身高等因素对防护效果的影响规律。结果显示:所提方法能极显著降低行人头部损伤,且在低速、低摩擦、矮行人身高下防护效果更佳。分析发现伸出可变车头长度优于固定车头长度,而在获得更高精度行人损伤风险曲线后可进一步优化所提方法。该研究将为M类、N类等大型平头车辆保护行人提供新思路,为它们利用长头车智能安全技术以更好地保护行人提供支持。

Here,to enhance the ability of flat-headed vehicles to protect human head against injuries and the acceptance level of regulations,a method for changing flat-headed vehicles into long-headed ones was proposed by deriving a formula for the extended length of vehicle head.Then,the damage protection effect of the proposed method and effects of factors of friction coefficient,vehicle speed,and pedestrian height on the protection effect were studied with theoretical and simulation analysis.The results showed that the proposed method can significantly reduce pedestrian head injuries,and have the better protective effect under low vehicle speed,low friction and short pedestrian heights;the extended variable head length is better than fixed head length,and the proposed method can be further optimized after obtaining a higher precision pedestrian injury risk curve;the study can provide new ideas for protecting pedestrians when using large M and N types of flat-headed vehicles,and provide supports for these vehicles to better protect pedestrians by using intelligent safety technology of long-headed vehicles.