Research on the Effect of Inner Lining on Fragment Scattering Characteristics of Fragmentation Warhead

Abstract

In order to improve the axial fragments killing power of fragmentation warhead, based on the Shapiro formula, a design method of the lining curve of the fragmentation warhead was proposed, and the fragmentation warhead was designed with a fragment scattering angle of 5° and 9° by using this method. Using LS-DYNA software and ALE algorithm, the numerical simulation calculation of fragment scattering process was carried out, and the static explosion test of the warhead prototype was carried out to verify the rationality of the lining curve design method. The influence of the shape and thickness of the inner lining curve on the scattering characteristics of the fragments is analyzed. The results show that the error value between the experimental value and the simulated value of the scattering angle and the theoretical design value is within 8%; the smaller the design value of the fragment scattering angle, the greater the curvature of the lining curve, and the smaller the initial scattering speed of the fragment; When the thickness of the inner lining is appropriately increased, the initial scattering speed of the fragments increases, and the scattering angle of the fragments decreases.