Research on the characteristics of projectile penetration into water based on fluid-structure Interaction

Abstract

To study the water entry characteristics such as fuze overload, projectile overload and water-gas interface change during the penetration of projectile from air to water at different angles. Using the HyperMesh/LS-Dyna joint simulation tool and the fluid-structure-Interaction algorithm, the relevant characteristics of the projectile penetrating water at different angles (30 °, 60 °, 90 °) are simulated numerically. The numerical simulation results show that the axial overload peak of the projectile is almost unchanged when the projectile penetrates the water at different angles, and the axial overload peak of the fuze decreases with the increase of the angle. Both the radial overload peak of the projectile and the fuze decrease with increasing water entry angle. The results show that the shock wave generated when the projectile penetrates into the water has a greater effect on the radial overload of the projectile and fuze than on the axial overload.