Accession Number : ADA188650

Title :   Travelling Wave Resonance in Gun Tubes.

Descriptive Note : Final rept.,

Corporate Author : ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENE T WEAPONS LAB

Personal Author(s) : Simkins, T E

PDF Url : ADA188650

Report Date : Oct 1987

Pagination or Media Count : 25

Abstract : Experimental and analytical studies have verified the existence of high amplitude dynamic strains in large caliber gun tubes. These strains have been observed to travel with the projectile as axially symmetric waves and are large enough to exceed the yield stress of the gun tube material and become even larger as the wave reflects from the muzzle. These waves not only create strains higher than those for which the gun tube is designed, but are capable through coupling of producing beam like motions affecting projectile launch conditions. Muzzle motions affecting round accuracy have long been suspect and their spurious character has evaded the most arduous attempts to predict them. The existence of large amplitude dynamic strains in gun tubes implies a projectile environment more hostile than previously supposed. Designers of projectile casings, warheads, fuzes, etc., should be interested in these ramifications as should those concerned with projectile/tube friction and wear.

Descriptors :   *GUN BARRELS, *TRAVELING WAVES, AXISYMMETRIC, FRICTION, GUN MUZZLES, LAUNCHING, MATERIALS, MOTION, PROJECTILE CASES, PROJECTILES, RESONANCE, SPURIOUS EFFECTS, STRESSES, TUBES, WARHEADS, WAVES, YIELD, RESONANCE, STRAIN(MECHANICS)

Subject Categories : Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE