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Safety, environmental protection and energy saving has become the three hot topics of today's automotive engineering field. With the rapid development of China's economy, the sharp increase in the number of private car ownership, the rapid growth of the domestic car ownership. Automobile while promoting social development, but also to road traffic caused negative effects can not be ignored. Frontal crash accident highest proportion of side collision accidents ranked second in the number of traffic fatalities; side impact accident highest proportion in the number of traffic accidents seriously injured frontal crash accident followed. Of most of the road traffic plane intersection, with the formation of high-grade highway network and the rapid development of tourism, passenger car ownership increased continuously improve the utilization rate, resulting in the occurrence probability of side impact accidents are also increasing. The passenger side is weaker strength bodywork parts, once by the impact, not like before and after the site as there is sufficient space to produce structural deformation absorb the impact energy, resulting in the crew's lives and safety are a serious threat. Therefore, to carry out the passenger side impact safety study of great significance to improving China's road traffic safety. This paper first analyzes car crash research background, to explore a car collision safety significance of domestic and foreign automobile collision computer simulation of the status quo; choose a 6127 and 6123 operating buses as the research object, with reference to domestic and foreign passenger car side collisions ECE R95, FMVSS 214 and GB20071-2006 display nonlinear finite element program LS-DYNA the body structure of the two cars side crash simulation analysis. Followed by a discussion the passenger skin on the side impact crash simulation analysis, collision side collision parts selected basis, as well as the element type, material models, meshing and control parameter settings, etc.; According to the results obtained by the simulation, respectively, from the body skeleton deformation, collision energy, collision acceleration and occupant survival space, the kind of car side security; preliminary study of the occupant side damage in the collision side installation test dummy, contrast with / without seat belts when the occupant state of motion, analysis of the dummy head, chest, pelvis injury indicators; The results showed that the occupant survival space intrusion larger due to the deformation of the passenger side of the suction energy space is limited, but the dummy model evaluation in the human body can withstand limits. Finally, in order to improve the crashworthiness of the side surface of the vehicle body, the simulation results before and after the modification, contrast improvement of the skeleton structure of two kinds of luggage compartment, draw programs appropriate to enhance the passenger side stiffness, effective dispersion of the collision force, reduce the side panels and The underframe rods invade the living space. The results of this research for the bus side collision formulation of safety regulations and corporate design and development of high side crashworthiness bus products provide a reference.
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