AEB对前碰假人运动姿态影响研究

Analysis of the Influence of AEB to the Dummy Motion Posture in Frontal Impact

AEB系统可以在碰撞事故中避免碰撞或者降低碰撞相对速度,但同时也会导致车内乘员偏离正常坐姿,进而降低原有约束系统的保护性能。在对Hybrid III与THUMS两种假人模型的颈部、胸椎及腰椎进行三点弧简化的基础上,搭建驾驶员有限元约束系统模型,分析正面碰撞中,两种假人模型颈部、胸椎及腰椎旋转运动的区别。并进一步研究了AEB作用对于两种假人模型转动姿态的影响。结果表明:AEB作用结束后,假人初始姿态发生变化,相比Hybrid III假人,THUMS假人躯干前倾现象更明显,骨盆有更大的向前滑移量;AEB作用下,两假人颈部与腰椎夹角变化有较大区别。

AEB system can avoid impact or reduce the impact relative speed,but passenger may deviates from the normal posture caused by AEB,the protection performance of the original restraint system is reduced.The cervical vertebra,thoracic vertebra and lumbar spine of Hybrid III and THUMS models were simplified by a three-point arc.Based on the simplified models,the model of driver FEM restraint system was developed,the rotational motion difference of two dummy models was analyzed in frontal impact and the influence of AEB to rotational posture of two models was researched.Results show that,the initial posture of the dummy changes after the end of AEB,THUMS model’s torso rotates forward more obviously than the Hybrid III dummy,and the pelvis of THUMS model has a greater amount of slip.AEB has a more obvious effect on the angle between the cervical vertebra and lumbar spine of THUMS model.