Simulation on the Influence of Key Parameters of Expansion Ring Energy Absorber to Buffer Efficiency Under High Velocity Impact

With introducing the principle of decreasing overload of onboard equipment by expansion ring energy absorber, numerical simulation of two key parameters of the device utilizing LS-DYNA was performed in this paper. The results show that the overload of onboard equipment exhibits linear change with half cone angle and wall thickness. And when half cone angle <i<α</i<=24° and wall thickness <i<t</i<=5 mm, the cushioning time is the best.