Numerical simulation of local response of ship in underwater explosive shock

Based on the finite element analysis with centered finite difference, this paper focuses on the underwater explosives, and the response of outer side armor of the ship under its impact. Investigating the linear placed cartridge Dynamite Explosion on different positions at the same depth in the water in the course of the study. And got the local displacement of ship plate and local stress and strain increase with time changes, the study gives the relationship between certain amount of Local maximum displacement of the armored ship and center of the explosion to the ship´s side. The results show that: ALE method is applicable to solve the explosion problem in the Solid-fluid coupling which can better simulate and forecast the structure response under the nonlinear dynamic of blast.