Projectile Foundation Moment Generation

Abstract

A project was initiated to develop methods to evaluate the magnitude of restoring foundation moment generated by cocking of an obturated projectile while in bore. An analytical and experimental study was undertaken to assess the magnitude of this foundation moment for a stationary projectile. The analytical portion of the study consisted of a finite element analysis conducted using the computer code ANSYS. An experimental apparatus was constructed to test the validity of the finite element approach. The results of this study indicate that the foundation moment is large. A comparison of this foundation moment to the moment caused by an off-axis rotation of the center of gravity (yaw-in-bore) shows that the foundation moment is equivalent to having the center of gravity at least 2.68 in.(6.8 cm) behind the axial center of the obturator band of a 120-mm kinetic energy projectile.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1983
Accession Number
ADA130024

Entities

People

  • E. M. Patton
  • F. A. Simonen
  • L. A. Strope

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Artillery
  • Center Of Gravity
  • Elastic Properties
  • Engineering
  • Geometry
  • Materials
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Projectiles
  • Shear Modulus
  • Shear Stresses
  • Stiffness
  • Test Fixtures
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Engineering
  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Geotechnical Engineering.
  • ballistics.