Fragment Velocity Distribution of Elliptical Cross-Section Killing Warhead Along Circumference

In order to study the fragments speed and its distribution law of the special-shaped warhead, the elliptical-section warhead structure was selected as the research object. Firstly, the finite element numerical method was used to obtain the acceleration law of warhead with different ratio of short and long axes, different ratio of charge quality C and shell quality M. The initial velocity of the fragmentation of the cylindrical warhead with the same C/M as the warhead of each elliptical section is simulated, and the initial velocity of the fragmentation of the circular section warhead, the azimuth angle δ when the velocity of elliptical warhead is the same as that of cylindrical warhead, the variations of δ of the elliptical section warhead with the axial ratio and the C/M change are obtained. Based on the Gurney formula, the initial velocity and the formula for calculating the initial velocity of the fragment of the elliptical section warhead shell is obtained along the circumferential direction by correcting the β and energy loss. The calculated results show that the initial velocity of the fragment is the largest in the circumferential direction along the short axis and the smallest along the long axis.