Accession Number : ADA320830

Title :   Fluid-Interaction and Cavitation Effects on a Surface Ship Model Due to an Underwater Explosion.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Santiago, Leonard D.

PDF Url : ADA320830

Report Date : SEP 1996

Pagination or Media Count : 148

Abstract : A surface ship subjected to an underwater explosion is exposed to shock waves over a short period of time which can vary in magnitude based on charge type, size, and location. The energy of those waves impinging upon the hull is transmitted throughout the ship's structure and vital equipment. The dynamics of the shock waves also influence the fluid surrounding the outer hull of the ship, creating an area of cavitating fluid. The combination of the shock waves, bubble pulsations, and cavitating fluid induce shipwide vibrations on hull supports and mission essential equipment which may become inoperative. In view of congressional requirements for new ship designs and systems to be shock tested, this thesis investigates the modeling of a preliminary design (Flight I) of the Arleigh Burke Destroyer (DDG 51) exposed to an underwater explosion. The effects of cavitation on one and two dimensional models is explored to determine if cavitation effects are substantially important to a three dimensional ship model. Validation of modeling underwater explosion effects upon a ship model can provide potential insight and savings in cost for future live fire testing and evaluation of the Flight IIA (DDG 79) design of the Arleigh Burke Destroyer.

Descriptors :   *EXPLOSION EFFECTS, *UNDERWATER EXPLOSIONS, *SHIP HULLS, SHOCK WAVES, THESES, SHIP MODELS, NAVAL ARCHITECTURE, GUIDED MISSILE SHIPS, CAVITATION, DESTROYERS, EXPLOSION BUBBLES.

Subject Categories : Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE