Wave Coupling and Resonance in Gun Tubes

Abstract

Uncommonly large dynamic strains observed during the firing of a 120- mm gun tube have been found to be due to a projectile velocity which causes resonant type behavior of a particular axisymmetric wave. The theory explaining this phenomenon is reviewed and extended to show the potential for excitation of nonaxially symmetric waves through coupling when the tube has an eccentric bore. These non-axially symmetric waves, one of which resonates at a projectile velocity extremely close to that which causes axisymmetric resonance, cause a beamlike motion of the gun tube which can affect accuracy at the target. Keywords: Wave motion in solids; Critical velocity theory; Vibrations; Interior ballistics; Gun barrels; Resonance; Strain mechanics; Flexural waves resonance.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1989
Accession Number
ADA207098

Entities

People

  • T. E. Simkins

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

DTIC Thesaurus Topics

  • Air Force
  • Axisymmetric
  • Couplings
  • Differential Equations
  • Equations
  • Equations Of Motion
  • Group Velocity
  • Guns
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Phase Velocity
  • Shear Modulus
  • Steady State
  • Thick Walls
  • Walls
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electronics Engineering
  • Structural Dynamics.