Effect of Initial Imperfections on the Response of Cylinders to Underwater Shock

Presently, the United States Navy is searching for an improved method to predict the damage to a ship hull 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 An...

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Bibliographische Detailangaben
Hauptverfasser:	Hooker, D T, Shin, Y S, Kwon, Y W
Format:	Report
Sprache:	eng
Schlagworte:	COMPUTERIZED SIMULATION CYLINDERS CYLINDRICAL BODIES DAMAGE DEFORMATION Explosions FINITE ELEMENT ANALYSIS Marine Engineering MATHEMATICAL MODELS NAVY RING STIFFENED CYLINDERS SENSITIVITY SHIP HULLS SHIPS SHOCK SHOCK WAVES STIFFNESS UNDERWATER EXPLOSIONS UNDERWATER STRUCTURES USA/DYNA3D COMPUTER PROGRAM
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Beschreibung
Zusammenfassung:	Presently, the United States Navy is searching for an improved method to predict the damage to a ship hull 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) combined with VEC/DYNA3D is used for the analysis of the effect of explosive shock on numerical models. Initial 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 USA/DYNA3D code. A sensitivity analysis is performed to look into the details on the damage resulting from these simulations. Underwater shock, Initial imperfections