某车辆滚翻过程中乘员颈部动态响应

Dynamic Response of Occupant′s Neck During Rolling of a Vehicle

为研究某型车辆滚翻过程中车内副驾驶乘员的颈部运动损伤类型,采用LS-Dyna软件模拟被测车辆坡度滚翻、平台车滚翻和螺旋滚翻过程,分析车辆滚翻过程中乘员颈部力和力矩响应情况,判断乘员颈部损伤状态。结合颈部力与力矩建立一种判断某时刻乘员颈部姿态的假设,可在试验中无假人运动录像的情况下再现假人运动姿态。对某型车辆进行整车坡面滚翻试验,验证坡度滚翻仿真结果的准确性。分析结果表明:结合颈部力与颈部力矩的响应情况可以准确判断副驾驶乘员在滚翻过程中的颈部运动状态,表明乘员头部与车体的接触碰撞对乘员颈部损伤有重要影响。

In order to study the type of neck sports injury of the passenger in the front passenger seat of a vehicle during the rollover process,LS-Dyna software is used to simulate the slope rollover,platform vehicle rollover and spiral rollover process,analyze the neck force and moment response of the passenger during the rollover process,and judge the neck injury state of the passenger.Based on the neck force and moment,a hypothesis is established to judge the neck posture of the occupant at a certain moment,which can reproduce the motion posture of the dummy without recording the dummy’s motion in the test.The slope rollover test of a vehicle is carried out to verify the accuracy of the slope rollover simulation results.The analysis results show that the neck movement state of the passenger in the process of rollover can be accurately judged by combining the response of neck force and neck moment,and it is concluded that the contact collision between the head of the passenger and the vehicle body has an important impact on the neck injury of the passenger in the process of rollover.