Fragments' velocity of eccentric warhead with double symmetric detonators

Eccentric warhead is a typical directional warhead, and its explosive wave is adjusted to improve the fragments' velocity in a specified area. The kinematic equation of a case was established in the polar coordinate system, and the Whitham method was adopted to realize the interaction of a double symmetric explosive wave, thus obtaining the trace of the triple wave point, the pressure and the height of the Mach stick, which were then calculated. By the combination of the kinematic equation and the Mach reflection, formula were deduced to evaluate the fragments' velocity in the Mach area. Comparison of the results obtained with AUTODYN 2D simulation shows that they are in good agreement. Double symmetric initiations increase the fragment's velocity by more than 30%, and the variation of the angle between initiations has little effect on the fragments' distribution and velocity.