不同类型偏置碰撞的驾驶员腿部伤害对比研究

为了探讨不同类型偏置碰撞下驾驶员腿部伤害的差异性,本文在对C-NCAP40%偏置碰撞及IIHS 25%小偏置碰撞两种不同类型偏置碰撞试验的试验工况、假人腿部评价指标进行介绍的基础上,对某乘用车车型在上述两种试验下驾驶员的腿部伤害指标进行了对比研究,并从碰撞力的传递路径对其结果进行了分析。结果表明:由于碰撞中车身与壁障重叠率的不同导致不同的碰撞力传递路径,最终导致车身变形的差异。其中,25%小偏置碰撞对车身的破坏程度极大,试验后驾驶员侧的A柱严重变形,车身结构大量侵入到车内生存空间,故其假人腿部伤害值大于另外两种正面碰撞,尤其是驾驶员左腿伤害值。优化车身前端结构,增加A柱强度,最大程度保证驾驶舱腿部生存空间,才能有效提高小偏置碰撞中乘员的安全性能。

Study of the Driver Leg Injury for Different Types of Offset Frontal Collision

In order to explore the differences of driver leg injury for different types of offset frontal collision,based on the intruduction of test conditions and dummy leg evaluation indicators for C-NCAP 40%offset frontal collision and IIHS 25%small overlap crash,comparative study of leg injury was made for the above two experiments.And the results were analyzed from the collision force transfer paths.The results showed that different overlap rates between car body and barrier lead to different collision force transfer paths,eventually,lead to different body deformations.In addition,the destructiveness of 25%small overlap crash is the largest to the body.After collision,the A column of driver side sufferefd serious deformation,body structure largely invad to the interior living space.So,the injury indicators of driver leg are larger than C-NCAP 40%offset frontal collision,especially the driver’s left leg.Optimize the front body structure,increase the strength of A column,and ensure cockpit living space to the greatest extent,can effectively improve the safety performance of occupant in small overlap collision.