Theoretical analysis of the shock loading acting on a plane plate is performed for an underwater explosion. An effective new numerical method is used to simulate the plate plastic permanent deformation based on the shock loading acting on the plate. During the numerical simulation, only the structure domain is modelled and gas bubble reloading is ignored, and so computation efficiency is highly improved. The numerical results are modified based on the distribution of shock energy during the underwater explosion, and the modified numerical results are in good agreement with the experimental results.
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