Abstract: In the frontal collision, the acceleration curve of the vehicle body is the most important factor on occupants protection,due to the characteristic of high frequency oscillation of crash curve, it is very difficult to be directly used to research on the relationships between crash pulse and occupants injury. According to the characteristics of the vehicle frontal collision, the transmission path of the vehicle was divided into different stages and the acceleration curves were parametric modeled due to the different stages. The effects of two kinds of vehicle acceleration curves on the dummy injury were discussed by using the finite element model. The results show that the similarity between the simplified curve and the original curve was high, and the responses of dummies in the two curves were basically the same. The simplified curve can be used to replace the original curve for vehicle crash and dummy injury and provide assistance in studying the relationship between the vehicle acceleration characteristic points and their occurrence time on the damage of passengers.

Key words: frontal collision, vehicle acceleration curve, parametric modeling