Numerical Simulation on Armor Penetration of Double-layer Shaped Charge

In order to increase the stability and armor penetration of shaped charge jets,numerical simulation and the effect of varying thickness on armor penetration is analyzed by using LS-DYNA software. Results show that the armor penetration of the shaped charge with the outer shaped charge with thick edge and thin top increased 10% than the shaped charge with equal thickness. The armor penetration of the shaped charge with the outer shaped charge with thick top and thin edge is basically unchanged,but the jets velocity gradient decreased obviously and the stability of shaped charge jets increased with higher explode height. The warhead with the outer shaped charge with different thickness increased the stability and armor penetration of shaped charge jets.