Study on formation of JPC under large standoff distance condition

Abstract

In order to achieve penetration damage efficiently under larger standoff distance condition, a shaped charge warhead is designed on the basis of jetting penetrator charges (JPC) formation and disruption theory. The paper analyses the formation, elongation and disruption processes of JPC by using LS-DYNA software. The results show that JPC tail begins to break away at 8.5 charge diameters (CD) standoff distance. When the standoff increases, JPC head velocity decrease while JPC tail increase, and JPC length-diameter ratio increased significantly. Based on numerical simulation and theoretical investigation, it was found that the JPC still has good penetration ability at 15.5CD standoff distance, and JPC effective standoff is able to reach 20CD distance. The result provides a reference for the design of JPC warhead at large standoff distance.