Research On The Side Rigidity Matching Based On Improving The Vehicle Performance In Side Impact

With the increasing of the number of the vehicle possession, traffic accidents also increased. So, vehicle safety takes more attention than before. Side impact accidents account for 30 percent of all traffic accidents and just are minor to front impact. They also account for 35 percent of fatal injuries. In China, the grade crossing is the major pattern of urban traffic road. Thus, the occurrence probability of side impact accident is the highest, and the injury rate is also the highest. The death rate is only less than front impact. So, side impact research has become an important topic in the passive safety area. The side impact performance of cars has to be improved. The regulation on the occupants'protection in side impact accidents which was developed by China Automotive Technology & Research Center according to ECE R95 has been brought into effect in July 1st 2006, and New Car Assessment Program was also issued at the same time.Full car FE model and MDB model to be used in side impact simulation were developed. The models were verified by comparing with the requirements of rules and test data using computational simulation method. According to GB 20071-2006 rules, side-impact simulation was done. The car crash deformation was calculated by using LS-DYNA, and the dummy injury parameters were obtained by using MADYMO software. Some injury parameters had gone beyond the limit of the rules. In order to improve its crashworthiness, some effective methods were proposed. The simulation results show that the passenger injury parameters can be obviously decreased by increasing the stiffness of B pillar and the stiffness of the side door, and the reasonable designing of the floor structure.