In order to better reveal the interaction process between projectile and barrel, a thermomechanical coupled finite element analysis model for projectile engraving into the barrel was established.The bottom pressure of the projectile was loaded by VUAMP subroutine. The engraving process between the thermal-mechanical coupled model and the adiabatic model was compared. The influence of the free stroke before the projectile engraving on the projectile engraving was studied. and the different initial deflections of the projectile were analyzed. The results show that the squeezing resistance of thermal coupling is greater than that of adiabatic state, and the initial deflection angle has a great influence on the firing accuracy, and the projectile can still be squeeze into barrel when the initial deflection angle of 2°.%建立了弹丸挤进身管的热力耦合有限元分析模型, 弹底压力采用VUAMP子程序进行加载.对弹丸热力耦合模型与绝热模型的挤进过程进行了对比.研究弹丸挤进前的自由行程对弹丸挤进的影响;对弹丸不同的初始偏角进行挤进分析.结果表明:热力耦合的挤进阻力大于绝热状态下的挤进阻力, 初始偏角对射击精度影响很大, 弹丸在初始偏角为2°时仍可挤进身管.
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