Formation Regularity of Annular Shaped Charge Jet by Numerical Simulation

Formation process of an annular-shpere liner driven by shaped charge has been studied using AUTODYN numerical simulation software. Research works of factors, including length to diameter ratio of charge, detonation radius and distance between liner and shell, that affect the jet head velocity, deflection angle, and head diameter have been implemented. The results show that the liner driven by shaped charge initiated annularly will be shaped into a annular jet which can form a large-diemeter hole on the target, while the liner forms a converged jet when shaped charge is centrally initiated. As the ratio and the initiation radius increase, the jet diverges; as the distance between the liner and the shell increases, the jet converges.