Numerical Simulation of Protective Envelope of Explosive Reaction Armor

In this work, the three-dimensional finite element analysis software LS-DYNA was used to numerically simulate the ballistic performance of explosive reactive armor at different impact points, and the comparative experiments were also carried out in order to obtain the protective envelope of the explosive reaction armor, i.e., the ballistic performance at different impact points on the contact surface between the explosive reaction armor and the jet.The results show that the simulation results agree well with the experimental data.Studies indicate that there is a large difference in the ballistic performance at different impact points.Instead of the responsive armor's symmetrical center and its vicinity, the area with better ballistic performance is located 22.7 and 46.9 times of the jet diameter away from the bottom of the explosive reaction armor.The effective ballistic performance area of the explosive reaction armor accounts for approximately 65.8%, and its ballistic performance increased by about 37.5% compared to that of the border area.Furthermore, the protective capability at the lower part of the reaction armor is better than that at the upper part.