Design And Numerical Study Of A Blasting-penetrating Type Torpedo Warhead

The development of submarine technology caused a significant threat to our homelandsecurity, improve the damage effect of multilayer shell, many cabin structure of submarinetarget is the key to control the sea and win the war. In this paper, in order to improve thedamage effect when the torpedo non-contact explosion of the submarine, based on traditionalblasting type and common shaped charge torpedo warhead, designed a new type ofblast-shaped charge tandem torpedo warhead, the forward charge is a blast charge, when itexplode underwater can form a bubble, the following shaped charge can form a EFP whichflying through the bubble, so the EFP can penetrate through the non-pressure shell ofsubmarine with higher speed and better shape. It effectively improved the damage effect ofthe target by comprehensive utilization of underwater explosion shock wave, bubble pulse,shaped charge and bubble collapse energy. AUTODYN software is used for numericalsimulation of this tandem warhead.At first, study the related theories of underwater explosion and determine the size of theforward blast charge. Numerical simulate the process of bubble pulse and analysis theinfluencing factors of the pluse period and maximum radius. Then, study the theory of EFPmolding and determine the structure parameters of shaped charge. Numerical simulate of theforming process of EFP, analysis of main factors such as radius of curvature, thickness, topedge thickness, length-diameter ratio which influence the forming process of EFP, anoptimized design of shaped charge has been carried out. At last, Study damage effect ofunderwater explosion, shaped charge, blast-shaped charge tandem warhead on target by usingnumerical simulation method.Study on the comparison of three conditions: one is the charge underwater explosionnon-contact of the target which simulation of traditional blasting torpedo warheadperformance. The other one is EFP penetrating into water target which simulation of common shaped charge torpedo warhead performance. The last one is the EFP flying in the bubble andthen penetrating the target simulation of this blast-shaped charge tandem warhead. Thenumerical results show that: when the charge non-contact explode of the target, traditionalblasting type and common shaped torpedo warhead damage effect is not ideal, but the newblast-shaped charge torpedo warhead can guarantee the EFP penetrate the non-pressure shellof submarine with greater speed and good shape, and thus have better damage effect, thesuperiority of this design was verified.