The influence of initiation methods on the fragmentation characteristics of axially enhanced warheads

Based on Euler-Lagrange element coupling (CEL) simulation algorithm, this paper uses ABAQUS software to simulate and analyze the fragmentation of warhead under single point initiation, two-point initiation and four-point initiation. Simulation results show that the prefabricated fragment of the warhead can cover the target in the axial region completely. Regarding the velocity characteristics of the head fragments, tungsten-zirconium alloy and tungsten alloy fragments show different average velocities under different initiation modes. At four point initiation, the average velocity of tungsten-zirconium alloy fragments is 1371m/s, and the average velocity of tungsten alloy fragments is 1366m/s. At two point initiation, the average velocity of tungsten zirconium alloy fragment is 1351m/s, while the average velocity of tungsten alloy fragment is 1344m/s. When the single point initiation, the average speed of tungsten-zirconium alloy fragments is 1329m/s, and the average speed of tungsten alloy fragments is 1330m/s. The four-point initiation mode shows the highest axial fragment velocity, up to 1,848 m/s, while the single-point initiation mode has a maximum velocity of 1691m/s, a difference of about 150m/s. Secondly, with the increase of the flying angle, the fragment velocity will decrease accordingly. It can be seen that in the case of four-point initiation, the speed of the axial reinforcement fragment can be greatly increased, which can better solve the problem of the central blind area caused by the traditional killing warhead when striking the target, and achieve the coverage of the entire damage target area under the static explosion condition.