Simulation Analysis of the Safety of High-Energy Hydroxyl-Terminated Polybutadiene (HTPB) Engine under the Impact of Fragments

The safety of solid rocket engine use seriously affects the survivability and combat effectiveness weaponries. To study against fragment in complex battlefield environments, impact simulation a high-energy four-component HTPB propellant (hereafter referred to as engine) was conducted. equation state parameters reaction rate detonation product were calibrated by using 50 mm diameter cylinder test Lagrange combined with genetic algorithm. nonlinear dynamics software LS-DYNA used build finite element model simulate mechanical response under different operating conditions. This shows that critical velocity decreases increase number fragments. When fragments is more than 5, influence this factor on no longer obvious. Under same loading strength conditions, greater metal shell wall thickness, difficult it for be detonated shock. can provide reference design optimization analysis safety.