Research on fragment dispersion characteristics of focused warhead with eccentric initiation

Abstract

To enhance the damage effectiveness of focused warheads against targets, the research investigates the effects of the number and positions of eccentric initiation points on fragment dispersion characteristics in focused warheads. First, the numerical simulation was verified via central initiation experiment for focused warheads. Based on the verified numerical model, fragment dispersion with different initiations was further simulated. The results reveal main effects on the velocity gain zone, average fragment velocity, average kinetic energy, energy density, effective fragment count, and dispersion angle, which exhibit regular variations with changes in the number and positions of initiation points. Specifically, under the research conditions of the work, as the number of axial initiation points increases, the velocity gain zone expands. In contrast, the warhead dispersion angle, fragment velocity, and kinetic energy peak and then decline, while the energy density initially decreases and then exhibits slight fluctuations. The findings could be a reference for optimizing charge initiation design and improving the damage effect of focused warheads.