Dispersion Characteristics of Spherical Fragments Driven by Cylindrical Charge

To investigate the dispersion characteristics of spherical tungsten fragments driven by a cylindrical charge, dispersion tests were conducted on a warhead with spherical prefabricated fragments. Considering the limitation of traditional comb targets, which can only measure the maximum velocity instead of the velocity distribution of the fragment group, a novel crossed-comb target was designed and fabricated. This velocity measurement device successfully recorded the pulse signals generated by multiple fragments penetrating the target and the impact positions. Numerical simulations were conducted using LS-DYNA to calculate the dispersion characteristics of spherical fragments driven by cylindrical charges. The results indicate that the numerical simulation results agree well with the test data. The designed crossed-comb shaped target can accurately measure the scattering velocities of multiple fragments. Increasing the length-to-diameter ratio can mitigate the effect of rarefaction waves at both ends of the charge on the fragment velocities; however, this mitigating effect diminishes as the length-to-diameter ratio continues to increase.