The Underwater Contact Explosion Model Experiment Research On Ship Defensive Structure And Numerical Calculation

The research on anti-explosion and anti-shock performance of ship broadside defensive structure will be paid more and more attention when the recognition of ship survivability has been improved. But the expense is very big when the research and full-scale experiment of ship broadside defensive structure are carried on. So the typical part of ship broadside defensive structure is suitably simplified as model structure. The research on damage mechanism of the experiment of model structure subjected to underwater contact explosion is carried on. And the result will be helpful to the defensive mechanism of ship broadside structure.Based on the theory of underwater explosive, the phenomenon of underwater explosive, including spread of shock wave underwater etc., is analyzed. Then the mechanism about the circle and rectangle plate subjected to underwater explosive is analyzed and studied. The damage mechanism of the underwater contact explosive experiment of complex shell structure is analyzed and studied by the energy theory. Three dimensional finite element models are established by using PATRAN software, and then the simulative models are calculated by using LS-DYNA code. The process of the results is visualized using the software LS-PREPOST. At the same time, the dynamic curves of stress,strain and displacement etc. of the special situation of the ship defensive structures are obtained. The simulation results are dependable and reasonable compared with the data of the trial.