Modeling the Effect of Underwater Explosion on a Submerged Plate Structure

The experiments have determined that, even close to the detonating underwater charge, the gas bubble and shock wave are sufficiently separated to produce individual effects on plane structures. These results allow evaluating the shock wave parameters and the effects of these two phenomena to be studied separately. This paper focuses on the numerical modeling of the underwater gas bubble effect on submerged plate. We consider a plane structure made from ideal rigid-plastic material. An interaction between underwater explosion and plate will be analytically studied to obtain the equation governing the fluid force per unit length of the structure and the fluid – plane structure interaction equation. The time variation of the gas bubble radius and the explosion magnitude is graphically shown. The interaction between underwater explosion and a submerged flat structure will be simulated.