Geometry parameter optimization method for automobile energy-absorbing box

Automobile bumper and energy-absorbing box are the most important parts for automobile passive safety and play an important role in the safety of automobile crash. In order to improve car crash safety and reduce fuel consumption of vehicle, in this study we analyze the deformation and endoergic process of energy-absorbing box during the collision based on the software ANSYS/LS-DYNA. Taking automobile absorbing box wall thickness and geometry size as the design variable, the energy-absorbing box of the car is optimally designed by combining the sampling techniques of Latin Hypercube experimental, the approximate model and genetic algorithm under the conditions of strength, stiffness and energy absorption. Compared with the original energy-absorbing box, the optimized results show that the energy absorption of the energy-absorbing box is improved, and the weight is reduced.