Abstract:To study the influence of initiation point position on formation of circle-shaped multiple explosively formed projectile (MEFP), numerical simulation of the forming process of the circle-shaped MEFP was carried out with the ALE method using LS-DYNA, and the influence of the cutting reseau distance on radial dispersion angle was analyzed. Results indicate that such a charge structure can produce five pieces of sub-explosively formed projectile which has a definite mass, direction, and a velocity between 1600 m·s-1 and 2 400 m·s-1. Under fixed cutting reseau distance, with the increase of initiation point distance, the speed of MEFP increases, the radial dispersion angle of MEFP reduces gradually. The initiation point distance should be in a proper range from 0.56 to 0.89 times as long as Dk (Dk is the charge caliber) in order to form ideal sub-explosively formed projectile, and it has a best formation at 0.78 Dk.