Crash Compatibility Of A Certain SUV And Car

Automotive passive safety performance related to the life safety of the occupants in a car-to-car collision, the crash compatibility belonging to the automotive passive safety areas. Enhancing vehicle crash compatibility can help to improve especially the passive safety performance of the cars. By studying the collision process of different vehicles and analyzing the influence factors of car safety performance, research methods and measures to enhance crash compatibility were identified.Firstly, in this paper, different vehicle force measurement wall simulation model calculations were evaluated by using the average height of force and force homogeneity assessment measure. Then, in HyperWorks’HyperMesh module, four different crash simulation models of the SUV and car were built by modifying car model of the force measurement wall model and setting parameters. Simulation models were calculated in LS-DYNA. Finally, in HyperWorks’HyperGraph module, the calculation results were analyzed with car body structures acceleration and intrusion to research the response of the car body structure in the collision with SUV.Force measurement wall model simulation results showed that the SUV engine, front side member were the most offensive structure to cars, which were needed to be optimized to protect the safety of the car occupants.By analyzing the simulation results of four collision models of SUV and car, the following conclusions were gained. Full frontal crash and offset crash model simulation results show the best time of dropping the Neon model engine. The amount of energy absorption of engine would be reduced when the engine dropped before the best time, while the intrusion of passenger compartment would be increased when the engine dropped after that. Frontal crash model showed that Neon model hoardings severely deformed and made excessive intrusion. The position of car’s largest intrusion was elevated in the collision of SUV and car. Side impact model simulation results showed that the floor of car which was side impacted by SUV had smaller deformation and threshold structure of that had inadequate energy absorption. Bigger B-pillar intrusion distance and penetration speed were serious threat to the life safety of the driver. The rear-ending model simulation results showed that the rear lower structure of SUV model in the collision process still did not perfectly contact with the front side member of the car. The SUV needed to be installed bumper structure. A multi-load path needed to be created, so that the energy of the crew compartment could be evenly absorbed by overall structure, which reduces the concentrated impact force caused by the structure incompatible, rather than merely by a part of car crew cabin.