基于有限元法的某SUV后部碰撞分析研究

Research and Analysis of a SUV Rear Collision Based on FEM

基于有限元分析法,以某SUV为研究对象,建立了其有限元模型,对后保险杠中心和车角碰撞过程进行了模拟,通过分析其吸能特性,评价了后保险杠的碰撞性能,然后根据法规要求,对后部100%和40%重叠低速碰撞进行了仿真,分析了碰撞过程各部件的变形、应力分布及能量变化等,验证了设计的合理性,为结构的进一步优化提供了依据,该方法为研究整车后部碰撞提供了新的思路,对深入研究后保险杠、整车碰撞仿真及实车碰撞试验具有重要的参考价值.

The finite element model which takes a SUV as the object is established based on finite element a- nalysis, and this paper simulates the center and angle collision process of the rear bumper. It evaluates the performance of the rear bumper collision by analyzing the energy absorption characteristics. According to the laws and regulations, this paper simulates the 100% and 40% overlap of the rear part low-speed collision and ana- lyzes the collision deformation of every part, stress distribution and energy change, In the end, it verifies the rationality of the design. The results provide a basis for the further optimization of the structure and offer a new idea for the vehicle collision, and they are of great reference value for further study of the rear bumper, the ve- hicle collision simulation and real vehicle crash test.