A Numerical Study on Projectile Penetration into Underwater Torpedo Warhead

Abstract

Underwater torpedo interception could be conducted by shell perforation or even warhead impact detonation with high speed projectiles. This work deals with the projectile water entry and sequent penetration into underwater torpedo whereby both aluminium shell perforation and explosive detonation are numerically studied. The water entry model and aluminum impact model are validated against test data for underwater aluminum shell penetration. Targets are located under water with 20 cm depth where aluminium shells for penetration are air-back while the impact detonation model has explosives inside shell. Four kinds of different nose shape tungsten projectiles are used for penetration simulation, revealing that ogival nose projectiles have superior performance for both shell perforation as well as detonation than conical nose projectiles. Numerical predictions shed some light on nose shape optimization design of high velocity projectile against torpedoes.

Analysis and experiment of stress concentration in penetration fuze buffer materials under stress wave incursion

“…During the high-speed penetration process, both the projectile and the fuze are subjected to strong dynamic loads, and the stresses generated are transmitted in various forms of waves to different parts [1][2][3]. The phenomenon of stress waves is widely present in the lives and has been extensively studied by experts and scholars in various fields, mainly in engineering, military technology, and scientific theoretical research [4].…”