Effect of Impact Points on Interfering Jets in Reactive Armor of Double-Wedge Charges

In order to study the influence of impact points in the midline of a double-wedge charge reaction armor on jet interference, their abilities to interference jet are evaluated by the simulation software LSDYNA-3D.The important results such as the movement state of the flyer during the penetration process, the fracture condition of the slug, the instantaneous velocity of the target after exposure, the penetration depth of the target, and the opening pit were analyzed.The simulation results were compared with the experimental results as well.It was found that the impact of the boundary effect is significant when the target is in the top of the armored midline of the double-wedge charge.The impact of the double-wedge charge on the jet is less significant, the slug cannot break before reaching the target plate, leading to the breakdown of the target plate.For the impact point of 160 mm, the jet penetrates into the armor of the double wedge charge and the slug rupture time is earliest compared to the other impact points.Moreover, the slug is cut into multiple segments with significant displacement and the lowest instantaneous speed when colliding with the target plate, leading to the minimum penetration depth.Therefore the anti-penetration performance is superior to the traditional double-layer flat charge.The maximum error between the simulation results and the experimental measurement is less than 10% and therefore they agree with each other.