A METHOD TO INCREASE THE TIP VELOCITY OF A SHAPED CHARGE JET

摘要

A technique is presented to increase the tip velocity of a conventional shaped charge (SC) device by employing an air cavity wave shaper which overlaps the liner. Thus, the device is a combination of a SC and an air cavity charge. Two-dimensional, axisymmetric CTH simulations were used to design the warhead. CTH is a family of computer programs developed at Sandia National Laboratories for modeling solid dynamics problems involving shock-wave propagation, multiple materials, and large deformations in one, two, or three dimensions. The baseline case was a standard 7.5-cm-diameter liner. The liner is basically a 42° copper, conical liner with a tip velocity of 8.0 km/s. The air cavity, which overlaps the liner, increases the tip velocity of the coherent portion of the liner to about 10.0 km/s, with hypervelocity jet particles traveling in front of the tip with a velocity of about 14 km/s.