Numerical Simulation of Penetrating Simulant Targets of Submarine Structure by Explosively-formed Projectile of Torpedo Shaped Charge Warhead

The test of damage effect of the explosively-formed projectile(EFP) on submarine structure is of benefit to evaluate the damage power of anti-submarine torpedo shaped charge warhead. The varing law of the velocity and the acceleration of EFP during penetration processes are analyzed, and the damage effects of the stimulant targets of submarine structure are calculated by finite element analysis software ANSYS/LS-DYNA with ALE fluid-structure coupling algorithm. The EFP of 1.882 kg explosive warhead causes 49 mm crevasse on the simulant target of submarine pressure cabin after penetrating 650 mm simulant water cabin, and its still keeps the velocity of 131.5 m/s after penetrating 6 additional steel shells. Simulation results show that the model is reasonable, the algorithm is correct, and the damage effects are close to the experimental ones.