Abstract
To rapidly dissipate impact energy during a rockburst and safeguard support equipment from damage, this study introduced a corrugated straight tube flip-type energy absorption device. The energy absorption characteristics of this device were analyzed through numerical simulation, and the theoretical formula for axial load was derived using an energy method. Based on the response surface design method, a predictive model for response values was established. The influence of structural parameters on these response values was analyzed, leading to the determination of optimal structural parameters in conjunction with the application frame type and response value optimization objectives. Numerical simulations and impact tests were conducted and compared. The optimal structural parameters determined were: basic circle radius of 80 mm, inner convex arc radius of 23 mm, thickness of 6.5 mm, and curling radius of 13 mm. The impact test results indicated that the initial peak value of the support reaction force was 2710.91 kN, which fell within the range of 1.2-1.5 times the working resistance. The average support reaction force was larger, at 3028.10 kN, with a maximum energy absorption of 349.89 kJ. Comparing these results with numerical simulations revealed an error rate of less than 10%, demonstrating high consistency between simulation and test outcomes. The impact test confirmed that the corrugated straight tube flip-type energy absorption device exhibited excellent energy absorption and anti-impact characteristics.