Numerical simulation on underwater explosion of aluminized explosives and its damage to ship

The damage effect of aluminized explosives on the ship targets is an important evidence of checking whether the explosive formula is reasonable. In order to study the influence of the molar mass of aluminum and oxygen (Al/O ratio) on ship damage, the damage effect of aluminized RDX-based explosive (RDX/Al) on ship is researched by means of numerical simulation. The damage effect is explained from four aspects: displacement, acceleration, stress and strain. Simulated results show that the overall and the local damage effects of a ship increases and then decreases with the increase in Al/O ratio in the near field. The damage effect of explosive on ship is optimal when Al/O ratio is 0.36. It can be seen from the relationship between Al/O ratio and energy release rate that the main reason of ship damage is the shock wave energy in the near field.