Numerical Simulation of Shaped Warhead Penetrating the Target with Reactive Armor in Motion State

The processes of shaped warheads penetration of post-impact targets with reaction armor at different flight speeds (150, 200, 300, 400, 500 m/s) and in different penetration angles (30°, 45°, 60°) were simulated using the LS-DYNA program, and the interference of the jet and the result of its penetration into the target plate were discussed.The results show that when the penetration angle is a constant, the cutting length of the target surface increases with the increase of the velocity and the rate of the increase is the fastest at 30°, but the penetration depth decreases and the rate of the decrease is the slowest at 60°.When the flight speed is a constant in the range of 150-500 m/s, both the cutting length of the target surface and the penetration depth decrease with the increase of the angle.The drop of the cutting length of the target surface tends to increase at first and then decrease with the increase of the velocity and the maximum decrease is 59.6% at 300 m/s, whereas the drop of the penetration depth tends to decrease at first and then increase with the increase of the velocity and the minimum decrease is 39.3% at 350 m/s.The theoretical analysis was carried out and the numerical simulation method was proved correct.