Numerical Simulation of Disturbance by Double-Layer Explosive Reactive Armor with Wedged Flying-Plate on Jet

Based on the traditional explosive reactive armor (ERA), we designed a structure of double-layer ERA with wedged flying-plates, to achieve the best performance in jet disturbing.By using the simulation software ANSYS/LSDYNA-3D, we simulated 3 different schemes of ERA structures, and analyzed the flying states of flying-layers, the character of escaped jet, the kinetic energy of jet and the penetrating depth of target by jet separately.The results show that the flying-layer tended to rotate after the sandwich explosive were detonated, and a proper structure arrangement helped to enlarge the active area between the jet and the flying-layer.The kinetic energy of jet declined greatly after across the ERA, resulting in a lower penetrating depth.Of the 3 schemes, Scheme 2 has the smallest penetrating depth by jet into the target, the next is Scheme 3, while Scheme 1 has the maximum penetrating depth, indicating that the structure of Scheme 2 has the best protection effect.This study on the wedged double-layer ERA enriched the structure design of ERA, providing theoretical reference for its further research.