Simulation analysis of energy absorption characteristics of hyperbolic shallow shell anti-impact energy absorbing components

AN Dong; TU Jiawei; XU Hailiang; WANG Zhiyang; TANG Runsong

doi:10.13347/j.cnki.mkaq.20250388

Abstract：To enhance the impact resistance and energy absorption performance of hydraulic supports in mitigating coal mine rock burst,a hyperbolic shallow shell anti-impact energy-absorbing component was designed.Finite element numerical simulations were conducted to analyze the performance of a navel anti-impact energy-absorbing component under various parameters,including base arc chord height,lateral arc eccentricity,lateral arc chord height,stacking layers,as well as wall thickness and different materials.The finite element analysis results show that:increasing the base arc chord height(Lc)improved the load-bearing capacity of the component,with the average load-bearing force approaching the initial peak value,specifically,when the base arc chord height in-creased from 10 mm to 20 mm,the initial peak load-bearing capacity rose by 28%,and the average load-bearing capacity increased by 61;a larger lateral arc eccentricity(Lp)reduced the initial peak load-bearing capacity,while the average load-bearing capacity and total energy absorption peaked at an eccentricity of 5 mm,achieving values of 3 126 kN and 312.6 kJ,respectively;increasing the lateral arc chord height(Ld)decreased both the initial peak and average load-bearing capacities,with a notable acceleration in reduc-tion observed when the lateral arc chord height increased from 2 mm to 4 mm,resulting in an 11.9%decrease in initial peak capacity and a 12.5%reduction in average capacity;stacking additional layers stabilized the load-bearing capacity but widened its fluctuation range,with minimal variation in peak impact force Fmax;thicker walls enhanced load-bearing capacity without significantly affecting the fluctuation coefficient;material selection had a negligible impact on structural stability.When the chord height distance of the bottom surface of the hyperbolic shallow shell anti-impact energy absorption component is 20 mm,the side chord height distance is 2.5 mm,the eccentricity is 5 mm,the stacking layer number is 3,and the thickness is 8 mm,the initial peak bearing capacity of the hyperbolic shallow shell anti-impact energy absorption component reaches 3 390 kN,the average bearing capacity reaches 3 341 kN,the load fluctuation coefficient is 1.01,the total plastic deformation energy absorption of 100 mm is 334.1 kJ,the energy absorption per unit mass is 35.4 kJ/kg,which best meets the requirements of the energy absorption support,and it can be applied to various hy-draulic supports by adjusting the size,material and thickness.