Accession Number : ADA119726

Title :   The Influence of Tube Support Conditions on Muzzle Motions.

Descriptive Note : Final technical rept. Mar 79-Jun 82,

Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TX

Personal Author(s) : Cox,P A ; Hokanson,J C

PDF Url : ADA119726

Report Date : Jun 1982

Pagination or Media Count : 138

Abstract : This study addressed the effect of clearances between the tube and its support and the effect of support stiffness on the muzzle motions produced when a weapon is fired. A small-scale test weapon was designed, fabricated, and tested during the study. The test weapon included provisions for changing the clearance between the tube and the tube support sleeve and for changing support stiffness. Breech eccentricity and lubrication between sliding surfaces were also varied. A series of experiments was conducted in which tube support conditions were systematically varied and transverse motions of the tube were measured at eight locations. Additional measurements included tube recoil, timing of the firing pulse, chamber pressure, muzzle exit time, and muzzle velocity. Tube lateral motions were measured with noncontacting inductance transducers, and instrumentation systems for these and other transducers are described. Tube motions of the test weapon were calculated by the finite element method for comparison with the experimental results. The initial positions of the tube within the tube support sleeve, tube radial expansion, and tube support stiffness were found to be significant parameters affecting the predicted tube motion. (Author)

Descriptors :   *FINITE ELEMENT ANALYSIS, *GUN MUZZLES, *MUZZLE VELOCITY, *MOTION, GUN BARRELS, BREECH MECHANISMS, SUPPORTS, FIRING TESTS(ORDNANCE), DEFORMATION, LOADS(FORCES), STIFFNESS, PERFORMANCE(ENGINEERING), SCALE MODELS, DISPLACEMENT, GUN COMPONENTS, PARTS

Subject Categories : Numerical Mathematics
      Test Facilities, Equipment and Methods
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE