起爆方式对周向MEFP战斗部性能影响的数值仿真

Numerical Simulation of Effects of Initiation Mode on thePerformance of Circumferential MEFP Warhead

In order to research the effects of initiation mode on the formation of multiple explosively formed penetrators(MEFP),the five-layer circumferential MEFP warhead was taken as research object,and the effects of the initiation point height,the number of initiation points and the initiation synchronization error on the velocity and dispersion angle of MEFP damage element under single-point initiation and multi-point initiation were compared by Ls-dyna. The results of research show that,under the condition of single point initiation,the total dispersion angle of MEFP increases with the increase of initiation point height. Under the condition of central initiation,the total dispersion angle of the MEFP reaches the maximum,and the velocity difference of each MEFP reaches the minimum. The velocity of MEFP at the end of the charge weakens because of the rarefaction wave effect. The velocity of MEFP in the middle of warhead increases obviously under multi-points initiation,but it doesn’t increase obviously for the MEFP at the end of the charge. For the MEFP warhead whose caliber is larger than 48 mm,the initiation synchronization error less than 500 ns does not affect the velocity and angle of MEFP significantly. The initiation synchronization error seriously affects the formation of MEFP.