Nonlinear Response of Cylindrical Shells to Underwater Explosion: Testings and Numerical Prediction Using USA/DYNA3D

Abstract

Nonlinear 3-D Dynamic Analysis Code (VEC/DYNA3D) has been interfaced with Underwater Shock Analysis Code (USA) and capabilities were developed to perform numerical analysis of submerged and semi-submerged marine structures subjected to underwater explosion. A series of numerical analysis were performed to determine the elastic and elasto-plastic responses of cylindrical shell type structures. The results were favorably compared with those of underwater explosion testings. The coupled code USA/DYNA3D makes possible to predict shock- induced damage response of naval structure. In addition, numerical sensitivity analyses were undertaken to determine the importance of various physical and numerical modeling factors. This study showed clearly three types of response modes of cylinder subjected to a side-on explosion: accordion mode, breathing mode and whipping mode.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1992
Accession Number
ADA251945

Entities

People

  • P. K. Fox
  • Y. S. Shin
  • Y. W. Kwon

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boundary Element Methods
  • Computational Science
  • Engineering
  • Experimental Data
  • Explosions
  • Explosives
  • Far Field
  • Finite Element Analysis
  • Geometry
  • Materials
  • Measurement
  • Mechanical Engineering
  • Mechanics
  • Numerical Analysis
  • Strain Gages
  • Three Dimensional
  • Underwater Explosions

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Computational Fluid Dynamics (CFD)
  • Structural Dynamics.