Water Entry Structural Technique (WEST): An Analytical Technique to Determine Frangible Nosecap Behavior During Water Entry

Abstract

Described here is a computational method to design frangible nosecaps for air-and surface-launched undersea weapons (such as for ASROC, VLA, and Mk-50 torpedoes). WEST is a technique that can rapidly and accurately assess the state of stress and deformation of missile nosecaps intended to break up at water entry. WEST links the powerful geometry and FEM pre-and post-processor PATRAN, a potential-flow computer code that can calculate dynamic pressure-time histories of an arbitrary entry body, and the nonlinear FEA code ABAQUS. This code linkage has been validated through comparison with experimental work. WEST is a valuable analytical tool that reduces the design cycle time for frangible nosecaps. Keywords: Water entry, Nonlinear structural analysis, Frangible nosecap, Finite Element Analysis (FEA), Finite Element Model (FEM), Antisubmarine Rocket (ASROC), Vertical-Launched ASROC (VLA), Deformation.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1989
Accession Number
ADA219641

Entities

People

  • P. A. Jung
  • R. C. Shaw

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Counter WMD
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Anti-Submarine Missiles
  • Birds
  • Computational Science
  • Computers
  • Engineering
  • Finite Element Analysis
  • Flow
  • Fluid Mechanics
  • Geometry
  • Mechanics
  • Plastic Explosives
  • Potential Flow
  • Pressure Distribution
  • Structural Analysis
  • Structural Engineering
  • Surface Launched
  • Tensile Strength

Readers

  • Computer Science.
  • Maritime and Naval Warfare Studies
  • Structural Health Monitoring of Composite Structures.