A Parametric Modeling Method for Gun Barrel and a Meshing Generation Strategy for Worn Barrel

doi:10.3969/j.issn.1000-1093.2016.12.005

Abstract

Abstract: In order to accurately build the finite element model of worn gun barrel, a piecewise-connection algorithm is designed to generate parametric 3D solid model of bore, and a node-offset algorithm is proposed to construct the finite element analysis model of bore with different wear degrees. Based on the projectile-barrel interaction model of worn barrel, and taking account of the increment in bore's volume, the interior ballistic process is simulated by the thermo-mechanical coupling finite element method. And the main reason of degradation in muzzle velocity and chamber pressure for a 23 mm gun is also studied. The simulated result matches with the experimental data, which verifies the correctness of the proposed modeling method and meshing strategy. The present study not only has important guiding significance for the design and analysis of gun barrel, but also provides an evaluation method for the performance degradation of interior ballistic process.

Key words: ordnance science and technology, gun bore, 3D solid model, finite element model, projectile-barrel interaction, interior ballistics, wear

CLC Number:

TJ301

DING Chuan-jun, ZHANG Xiang-yan, LIU Ning. A Parametric Modeling Method for Gun Barrel and a Meshing Generation Strategy for Worn Barrel[J]. Acta Armamentarii, 2016, 37(12): 2212-2219.

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