Effect of Initial Imperfections on the Response of Cylinders to Underwater Explosion
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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Presently, the United States Navy is searching for an improved method to predict the damage to a ship or underwater structure that results from an underwater explosion. One method of predicting this damage is through the use of nonlinear finite and boundary element analysis. Underwater Shock Analysis USA code combined with VECDYNA3D code is used for the analysis of the effect of explosive shock on numerical models. Initial geometric imperfections are introduced in the numerical model using modal imperfections. The resulting numerical model is then subjected to a simulated underwater shock using the combined USADYNA3D code. A sensitivity analysis is performed to look into the details on the damage resulting from these simulations. Underwater shock, Initial imperfections.