TRANSIENT-RESPONSE OF STIFFENED COMPOSITE SUBMERSIBLE HULL SUBJECTED TO UNDERWATER EXPLOSIVE SHOCK

This paper deals with the transient response of a glass-epoxy composit e submersible hull subjected to underwater explosive shock. The doubly asymptotic approximation (DAA) method is employed in this study to de scribe the fluid-structure interactions. The fluid-structure coupled e quations, relating structure response to fluid impulsive loadings, are solved using coupled finite-element and boundary-element codes. Trans ient stress of the composite submersible hull induced by the underwate r explosive shock are studied. Effects of the explosive charge weight and the charge distance from the target on the transient stress are ex amined. In addition, a comparison between the transient responses to u nderwater explosive shock for the composite submersible hull and a ste el submersible hull is made. (C) 1998 Published by Elsevier Science Lt d. All rights reserved.