The Effect of Stiffener Smearing in a Ship-Like Box Structure Subjected to an Underwater Explosion

Abstract

Shock trials for naval vessels are a requirement for each new class of surface ships in the U.S. Navy. With understanding the technology of underwater shock analysis and considering the rising costs of conducting actual shock tests, computer simulation of shock trials is becoming more and more attractive. Unfortunately, finite element models can be quite large and require sufficient amounts of computer memory and time to run a shock analysis. This thesis investigates the effects of reducing the element size of a ship-like box model subjected to an underwater explosion. Known as smearing, this process combines the density and stiffness properties of the removed elements into the remaining material of the model. Positive results from computer simulation could greatly affect the manner in which shock trials are conducted with future ship classes.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1998
Accession Number
ADA353271

Entities

People

  • Keith A. Beiter

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Computer Simulations
  • Computers
  • Differential Equations
  • Explosions
  • Explosives
  • Materials
  • Mechanical Engineering
  • Modal Analysis
  • Modulus Of Elasticity
  • Navy
  • Shock Tests
  • Simulations
  • Stiffness
  • Three Dimensional
  • Underwater Explosions
  • United States Naval Academy
  • Uss John Paul Jones

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Computational Modeling and Simulation
  • Structural Dynamics.