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Parametric studies of DDG-81 ship shock trial simulations /

by Didoszak, Jarema M.

Abstract (Summary)
Motivated by the sizable ledger of ships sent to the ocean floor without ever sustaining a direct hit during World War II, a heightened interest in ship shock survivability spread throughout the Naval Engineering community. As a result, over the last fifty years, Live Fire Test & Evaluations, otherwise known as ship shock trials, have been conducted in order to determine the seaworthiness of each new class of ship commissioned in the U.S. Fleet. While beneficial in determining the overall survivability of a ship and its mission essential equipment in a severe shock environment, these Navy-mandated tests pose serious danger to the crew, ship and environment. As an alternative to these labor intensive, costly and time consuming at-sea tests, the recent advances in computer processing power have made it possible to employ finite element methods involving complex geometries in the modeling and simulation of shock response for the ship and surrounding fluid. This thesis examines the accuracy of shock simulation predictions as compared to the ship shock trials conducted on USS WINSTON S. CHURCHILL (DDG-81). An investigation of the effects of sensor location, damping and shot geometry is presented as validation of the Naval Postgraduate School modeling and simulation methodology.
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Advisor:

School:The United States Naval Postgraduate School

School Location:USA - California

Source Type:Master's Thesis

Keywords:underwater explosions computer simulation

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