The Research Of Key Technology On A Certain Directionally Antiaircraft And Antimissle Warhead

Inorder to make up insufficiently intercept ability for the warships to a certainairspace from incoming target，we study a warhead which can hierarchically detonate，eject energetic fragment into axial direction and tungsten ball fragment into radialdirection.Through the analysis of target characteristics，study of projectile structure andcalculation of the internal ballistic，we verify the rationality of its structure andlaunching safety， the relevant parameters of power which provides a reference for thenaval artillery are obtained. Based on the research of the target features，we build anequivalent target structure which has a certain thickness of aluminum alloy board. Withreference to the AK-176M single76mm naval artillery grenade for background，weresearch for the overall plan of the projectile structure，determines the head screw，theejection cartridge，the size of bearing band，quality of ejection and so on. Theparameters of structure characteristics are calculated；The projectile is verified that hasurgent screw stability by the twist condition method and gyro factor. Dynamic balanceangle is less than the limit in the peak of trajectory，the follow stability is verified. Andthe data meet the dynamic stability condition of the projectile；According to the firststrength theory and second strength theory，the projectile strength is verified it meets thesafely emission conditions.；We obtain the ignition pressure，parameter of characteristicpoints from interior ballistic and velocity of precast energetic fragments which areprojectiled by the calculation of interior ballistic. Because the power of grenade isanalyzed，the damage area，distribution density and penetration power of energeticfragment are calculated. Through the crumbliness study of projectile，the qualitydistribution and residual velocity of the fragment are obtained；Dynamic response ofexplosive in projectile penetrating aluminum based on LS-DYNA is simulated. Whencharge pressure is greater than the pressure of detonation，charge ignites. Residualvelocity is about400m/s after fragment penetrates the target.