Abstract:  Aiming at the problem of selecting the fracture protection device of 60MN super tensile superposition force standard machine, the energy absorption efficiency of honeycomb aluminum under super impact energy was studied.The energy absorption of honeycomb aluminum of different structural parameters was numerically simulated by ABAQUS/Explicit. By comparing the average load, peak load and specific energy absorption of honeycomb aluminum of different wall thickness and hexagon side length, the variation law of energy absorption efficiency was obtained. Using the response surface optimization method, the regression equation of the dependent variable was established with the wall thickness and hexagon side length as the design variables, and the genetic algorithm was used to optimize the design.Finally, the optimization results were verified by simulation.The results show that with the increase of the wall thickness and the decrease of the size of the small hexagon, the indexes of the energy absorber are improved.When the length of the honeycomb aluminum hexagon is 7.75mm and the wall thickness is 0.66mm, the optimal solution is obtained. The optimization results show that the error value of each index is controlled within 5%, this analysis method can provide reference for the selection of 60MN pullforward superposition type standard machine buffer device.

Key words: honeycomb aluminum; axial impact load; average load; specific energy absorption;the response surface method