The pre⁃folded energy absorber is the only energy absorber structure used in rock burst mine at present.It has excellent energy absorption characteristics

but there are some problems in the buckling deformation process such as large load fluctuation and spark due to friction.In view of the above situation

a sinusoidal bellows(reduced diameter round pipe)filled with emulsion was designed to form a solid⁃liquid coupling body energy absorption component(composite component).The effects of three factors

namely wall thickness of the bellows

amplitude of the busbar and diameter of the liquid outlet

on the energy absorption characteristics of the energy absorption component were studied.The prediction model of average load

load fluctuation coefficient and specific energy absorption was established.The smoothed partiole hydrodynamics(SPH)particle algorithm of Abaqus finite element software was used for fluid⁃structure coupling analysis of the model.The structural parameters of energy absorption components were optimized by response surface method and the optimization results were obtained.The results show that when the wall thickness of corrugated pipe is 3.959 mm

the amplitude of busbar is 3.721 mm

and the diameter of outlet is 22.161 mm

the energy absorption characteristics of the member are the best.The average load is 438.684 kN

the load fluctuation coefficient is 1.178

and the specific energy absorption is 12.123 kJ/kg.Through comparison and verification

the results have high reliability

which provides a superior energy absorption component for the energy absorption link of anti⁃impact support equipment.