Research on the Influence of Bore Wear on Projectile Motion Characteristics
During the artillery firing process,the high-temperature,high-pressure propellant gas,and the high-speed moving projectile contribute to the wear of the barrel bore,which subsequently alters the barrel bore's structure and directly impacts the ballistic performance.To address this issue con-cerning changes in projectile motion caused by barrel wear,a large-caliber gun was selected as the fo-cus.Five finite element models of the barrel with varying degrees of damage were established.These models were then coupled with the internal ballistic equations using ABAQUS/Explicit finite element software and its VUAMP subroutine.The results indicate that as radial wear increases,the projectile's engraving process accelerates,prolonging both the stroke and duration of the engraving process.Fur-thermore,the projectile's speed at the end of engraving increases,while key ballistic parameters such as muzzle velocity and chamber pressure gradually decrease.This study provides valuable insights into understanding how bore damage influences changes in ballistic performance and offers robust support for enhancing artillery performance and prolonging barrel service life.
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