冷热枪状态下弹枪相互作用的热力耦合分析

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Abstract

In order to investigate the temperature and motion state of copper jacket projectile in the barrel, a thermo-mechanical coupling finite element model of the barrel and bullet was built.In the model, a friction subroutine was developed to calculate the value of the friction coefficient between projectile and barrel at different contact temperature.The pressure of gunpowder gas was carried out by a load amplitude subroutine embedded interior ballistic equations.The results show that the surface temperature of copper jacketis up to about 200 ℃ after engraving into the bore when the barrel is room temperature.When the barrel is high temperature (Setting as 400 ℃ and 700 ℃ in the model, respectively), the surface temperature of copper jacket is close to the melting point of copper material and the surface material will break off during the movement in the bore.In addition, the change of the attack angle of the projectile in the bore under the condition of hot barrel is obviously greater than that under the condition of the room temperature barrel, which proves that the shooting accuracy of the hot barrel is worse than that of the room temperature barrel.The mechanism of this phenomenon is when the barrel is high temperature, the surface copper material will be softened.When the projectile engraves into the bore, the surface copper will be peeled off from the copper jacket.It causes the irregular deformation of copper jacket and a large swing of projectile in the bore.

Key words： thermo-mechanical coupling copper jacket projectile temperature of ballet motion state of projectile

Received: 07 August 2018 Published: 15 May 2020

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	YANG Yuzhao
	ZHANG Xiaoyun
	XU Cheng

Cite this article:

YANG Yuzhao,ZHANG Xiaoyun,XU Cheng. The interaction between copper jacket projectile and barrel under different temperature based on thermo-mechanical coupling finite element model[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(10): 44-51.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I10/44

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