将弹带应变能和摩擦耗散能引入到经典内弹道能量平衡方程中,考虑药室锥度计算膛内火药气体压力的分布规律,得到弹丸起始运动内弹道方程,并将其解作为力边界条件,利用显式方法对三维弹带挤进过程进行热力耦合计算。同时,采用改进库伦模型,考虑温度对摩擦力的影响计算弹带身管之间的摩擦力。分析了典型火炮挤进过程中挤进阻力、膛压以及弹丸速度的变化规律,对火炮设计、射击精度提供了有益参考。
Abstract
Interior ballistic equation during rotating band engraving process was elaborated by introducing the strain energy and friction dissipation into the energy balance equation and calculating the propellant gas pressure distribution in the tapered chamber, the results of the equation were taken as the boundary conditions of the coupled thermo-mechanical analysis of engraving process. The friction between the rotating band and the barrel was modeled using modified Coulomb model which the temperature at the interface was taken into consideration. The velocity of the projectile and pressure in bore was get and changes of resistance was analyzed, it may help to make better understanding of the artillery design and firing accuracy.
关键词
弹带 /
挤进 /
起始内弹道 /
高速摩擦
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Key words
rotating band /
engraving process /
initial interior ballistic /
high speed sliding
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参考文献
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脚注
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