汽车侧面柱碰位置与速度对车体安全性的影响

Influence of collision location and speed on the car body security in pole side impact of a passenger car

为评价乘用汽车在侧面柱碰事故中的安全性,仿真分析了其碰撞能量的转移路径,研究了不同碰撞位置、碰撞速度对车体安全性的影响。联合LS-DYNA与HyperW orks软件,建立了乘用汽车在碰撞速度方向与车体纵向轴线成75°角时发生侧面柱碰的有限元模型,对碰撞立面分别处于驾驶员假人头部中心、肋骨中心、胯点位置,在碰撞速度分别为29、32、35 km/h时,汽车侧面柱碰事故的形态进行了仿真。研究表明:在碰撞角为75°的情况下,当碰撞立面通过假人头部中心并且碰撞速度为32 km/h时,车体结构的安全性在所考虑的几种工况中表现最差。

The impact energy transfer paths were simulated and analyzed for a passenger car in pole side impact accident to evaluate the passenger car＇s security, and to investigate the influence of both collision locations and speeds on body security. A finite element model for car＇s pole side impact was developed by using LS-DYNA and Hyper Works software at the collision speed direction of 75° to body longitudinal axis. And special accidents were respectively simulated when vertical impact plane passes the dummy head center, the rib center, the hip point on driver＇s seat at the collision speed of 29, 32, 35 km/h. The results show that the worst security of body structure occurs when the vertical impact plane passing the dummy head center at the collision speed of 32 km/h, for all considered situations of car＇s 75° pole side impact.