Accession Number : ADA323756

Title :   Design of Passive Vibration Absorber to Reduce Terrain-Induced Gun Barrel Vibration in the Frequency Domain.

Descriptive Note : Final rept.,

Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS

Personal Author(s) : Kathe, Eric L.

PDF Url : ADA323756

Report Date : FEB 1997

Pagination or Media Count : 27

Abstract : This paper presents an applied method for the optimal design of passive vibration absorbers to reduce terrain-induced vibrations of tank cannons. The method uses a finite element model of the cannon, which was formulated using the Euler-Bernoulli transverse beam approximation. This model is then transformed to the Laplace 's' domain (transfer function form) using the MATLAB software package. The design is optimized by assigning a scalar cost function to the frequency response of the modified barrel, which provides a metric for minimizing the design parameter space. The results indicate that the peak amplitude of the frequency response of a 1,500 Kg barrel may be cut in half by an appropriately tuned 20 Kg absorber located at the muzzle. Also, sensitivity of the design to parametric variation and modeling uncertainty is significantly reduced with Rayleigh stiffness proportional damping of the absorber in the range 0.02 (N/(m/s))/(N/m).

Descriptors :   *MATHEMATICAL MODELS, *VIBRATION, *GUN BARRELS, OPTIMIZATION, PARAMETRIC ANALYSIS, COMPUTER AIDED DESIGN, FINITE ELEMENT ANALYSIS, DAMPING, VIBRATION ISOLATORS, PASSIVE SYSTEMS, TANK GUNS, APPLIED MATHEMATICS, FREQUENCY DOMAIN, FREQUENCY RESPONSE, GUN MUZZLES, LAPLACE TRANSFORMATION.

Subject Categories : Guns
      Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE