Modern forms of warfare have posed increasingly higher requirements on the precision of small-caliber rapid-fire weapons,while the issue of shooting anomalies,resulting from elevated barrel temperature,is in existence all through.To handle the aforementioned issues,the muzzle motion behavior under heated barrel conditions was analyzed in this paper.Taking the 5.8 mm rifle as research object,a thermo-pressure coupled model of bullet-barrel interaction was constructed based on the nonlinear finite element method.Some tests were carried out to validate the correctness of the coupled model on bullet muzzle velocity and bullet soft-recovery.Based on this,the study summarized the impact of material thermos-physical properties on the muzzle motion state under heated barrel conditions.Specifically,the influence was analyzed from three distinct aspects,the ther-moplastic behavior of the bullet jacket,the thermo-elastic response of the barrel,and the thermal expansion char-acteristics of the barrel.The results show that the constructed model can be provided for the resolution of shoot-ing anomalies resulting from elevated barrel temperature and for the study of the mechanism of bullet/barrel in-teraction.
关键词
火炮、自动武器与弹药工程/弹/枪相互作用/膛口运动/射击精度/热/力耦合
Key words
artillery,automatic weapons and ammunition engineering/interaction between bullet and barrel/muzzle motion/shooting accuracy/thermo-mechanical couple
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