Optimized Body Structure Of High-speed Rollover Based On Sequence Approximate Theoretical?Experimental And Simulation Study Of The Safety

Major accidents caused due to vehicle rollover occurred frequently. Vehicle rollover accident will not only bring greater injury to persons but also caused economic losses nearly $ 50 billion per year. However, due to the diversity of the reasons causing rollover and the type of it, vehicle and occupant movement complexity, there are great difficulties in rollover test and simulation research. To this end, based on safety body structure design and LS- DYNA finite element analysis, this paper have analyzed the roof structure's deformation characteristics in rolling, the roof structure's invasion and intrusion speed case. The main results obtained are as follows Institute:Compared to invade speed, due to the rigid body motion of the vehicle is not included,invasion is a more realistic reaction the deformation characteristics in the roof. In a rollover crash the roof where near the driver's head intrusion of the occupant survival space reach 93.31 mm. A column bent has little impact on occupant survival space, the maximum bending angle is 3?. Installation of the support beams in the roof can significantly reduce the invasion in the front of the roof, after optimization invasion at the position of the components where close to the driver's head coming down from 93.31 mm to 91.34 mm, decreased by 2.1%.After the installation of the support beams, based on the structure of body parts through the thickness of the parametric design optimization, the amount of intrusion at the parts of the roof where near the driver's head coming down from 91.34 mm to 87.34 mm, reduced by 4.3%.The amount of invasive evaluation is also reduced from 60.72 mm to 60.12 mm, reduced by 0.98%.Choose different thickness of the size of the body structure and by adopting the method of orthogonal experimental design to optimize and improve the body deformation characteristics in high-speed rollover is an important way to seek protection of occupants and have laid the foundation for finite element rolling simulation with a dummy and occupant protection research.