In order to study the relationship between pedestrian fatality risk and impact speed in domestic pedestrian traffic accidents. According to the frontal shapes of domestic vehicles, this paper divided the vehicle types into long head car, short head car and flat car. Used in-depth accident study method to collect a large number of actual traffic accidents cases. The logistic regression models of pedestrian fatality risk and impact speed of long head car, short head car and flat car were established. The Wald Chi-Square test was used to validate the accuracy of the model. The results shows: The long head car corresponds to the lowest pedestrian fatality risk, the flat car corresponds to the highest values. Compared with developed countries, the developed emergency and medical care play an important role in reducing the pedestrian fatality risk.

Applied to an electric car, the battery frame structure was designed for the storage batteries of electric vehicles under the test conditions in accordance with the GB11551-2003 regulations, and the crashworthiness finite element analysis was conducted with ANSYS/LA-DYNA through which the deformation of the battery frame is observed. Under the premise of ensuring the storage battery is not disconnected from the shackles and fled into the crew cabin, the structure is optimized, and safety of the battery protection device is evaluated. Combining with the safety test program and finishing lightweight optimization design.

In order to research the influence of the parameters of laminated windshield glass to pedestrian head injuries in vehicle-pedestrian accident, the adaptive response surface method (RSM) was utilized to optimize the key parameters of the laminated glass i.e. the elastic modulus, yield strength, density and the glass thickness, in which the pedestrian head injury criteria (HIC) and glass crack radius were setting as the objective function. A set of glass parameters was obtained which was the most beneficial to the pedestrian protection. The optimization may provide theory basis for the design and research of PVB laminated windshield.

This paper firstly studied the structure of front longitudinal, then reviewing comprehensive literature draw the similarity of collision of the thin-walled tube and front longitudinal,finally ensure the study of collision of the thin-walled tube. And establishing three kinds of thin-walled welded rectangular beam finite element model of spot welding, seam welding and laser welding, arrive a more superior technology through researching and analyzing the model.

The driving conditions of commercial trucks are very complex, therefore, the study of trucks longitudinal braking friction coefficient is difficult. Domestic research in this area is still in blank. The factors of light trucks longitudinal braking friction coefficient are researched, with the orthogonal experiment of different factors and levels. From the orthogonal experiment, how many main factors affect the longitudinal braking friction coefficient is acquired. After that, perform the experiment of longitudinal braking friction coefficient under the condition of single factor variable , such as, vehicle speed, load. From the results, variation tendency of every single factor variable is obtained.