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Slide1: 

NPS Shock Team Dr. Young S. Shin Jarema M. Didoszak Jose J. Lepe

Slide2: 

DDG-81 Shock Trials

General Statements : 

General Statements Objective: Accurately predict the Shock Response of a surface ship in an Underwater Explosion Event Research Benefits: NPS work on ship shock trial modeling and simulation has been changing the Navy’s direction for ship shock qualification. Computer simulation provides a viable alternative to Ship Shock Trial testing. Thesis Students: Three-four per year in Ship Shock research. Whole Ship Shock Trial Cost: DDG-53 $ 46M, DDG-81 $28M. Potential Navy savings of over $100M by replacing whole ship shock trial with ship shock modeling and simulation. Reimbursable Funding: $250K per year from NAVSEA

Ship Shock Trials: 

Shock trials performed May-June 2001 of the coast of Mayport, Florida Three different shots conducted using HBX-1 high explosives Purpose: Test the survivability of mission essential equipment Assessment of design improvements from DDG 53 shock trials Ship Shock Trials

Slide5: 

Whole Ship Shock Live Fire Test & Evaluation

Slide6: 

Modeling UNDEX in a Virtual Environment

NPS Coupled Fluid-Ship Model: 

NPS Coupled Fluid-Ship Model

DDG 81 Finite Element Model: 

DDG 81 Finite Element Model Most complex and detailed finite element ship model constructed to date All decks, bulkheads, stiffeners, and major equipment included in model

NPS Computer Simulation: 

NPS Computer Simulation

Vertical Velocity Response Comparison: 

Vertical Velocity Response Comparison

Prediction of Potential Damage: 

Prediction of Potential Damage

Underwater Explosion Research at NPS: 

Underwater Explosion Research at NPS Navy Relevance: Predictions of Potential Damage Areas & Assessment to Underwater Explosions Assessment of Vulnerability and Survivability of Surface Ship & Submarine to Underwater Explosion Navy Fleet Support Activities: 3-D Ship Shock Modeling & Simulation of Ship Shock Trials: DDG-53, USS John Paul Jones – FLT I (Completed) DDG-81, USS Winston S. Churchill – FLT IIA (Completed) LPD-17, USS San Antonio – (in-Progress) Research Topics: Underwater Explosion and Its Effect on Ship & Submarine 3-D Ship Shock Modeling and Simulation Ship Shock Vulnerability and Survivability Studies Ship System Damping: Energy Dissipation Mechanisms Research Sponsors: NAVSEA, NSWC-CD For Further Information, Contact Professor Young S. Shin, Email: yshin@nps.edu Phone (831) 656-2568 DDG 81 Ship Shock Trial, June, 2001 DDG 81 Ship Model Coupled With Fluid