RESEARCH ON CRITICAL DETONATION VELOCITY OF INSENSITIVE EXPLOSIVE IMPACTED BY ROD-TYPE PROJECTILE

The numerical simulation on the initiation process of the covered insensitive explosive PBXN-109 impacted by tungsten rod-type armor piercing projectile was carried out by the shock physical explicit Eulerian dynamic software SPEED. The “up-down” method was used to obtain the projectile critical detonation velocity. The effects of projectile diameter, projectile length, shell thickness and charge material on the projectile critical detonation velocity were obtained. The research results show that the projectile critical detonation velocity decreases as projectile diameter increases. It first decreases and then becomes stable as projectile length increases. It increases linearly as shell thickness increases. The critical detonation velocity of PBXN-109 charge is significantly greater than that of Comp-B charge. Affected by the charge initiation mechanism, the velocity amplification increases as projectile diameter increases, and the maximum value can reach about 154%. Utilizing the insensitive explosive PBXN-109 as the warhead charge can effectively protect against the impact initiation of rod-type projectile.