为研究某小口径火炮不同坡膛结构下弹丸挤进过程的动力学特性，建立了考虑挤进阻力变化的内弹道方程组并通过vuamp子程序引入到有限元求解中，实现了挤进过程中内弹道计算与弹丸挤进有限元仿真耦合求解。通过对弹丸全膛运动的仿真分析验证了模型的可行性，随后得到并分析不同坡膛锥度、膛线深度及阴线宽度下挤进过程中弹丸的速度、加速度、挤进阻力和膛压曲线及变化影响规律。结果表明，坡膛锥度对挤进过程中弹丸的动力学参数影响不是单调的，而膛线深度及阴线宽度的改变则单调地影响弹丸动力学参数，对优化坡膛结构及弹带设计具有一定的指导意义。
Abstract
In order to optimize forcing cone structures and analyze the dynamic characteristics of the engraving process under different forcing cone structures of a small caliber gun, established an internal ballistic equation system considering changes in projectile resistance and introduced it into finite element solution via using the vuamp subroutine to achieve the coupling calculation model of internal ballistics calculation and finite element simulation in the engraving process. The feasibility of the model was verified through simulation analysis of the full barrel motion of the projectile. Simulated and analyzed the velocity, acceleration, and resistance curves and variation patterns of the projectile during the engraving process under different forcing cone taper, rifling depth, and concave line width. The result indicates that the influence of slope chamber taper on the projectile's dynamic parameters during the extrusion process is not monotonic, while the changes in rifling depth and concave line width monotonically affect the projectile's dynamic parameters. This method can provide reference and guidance for the design and optimization of gun barrel structures and bearing band.
关键词
挤进过程 /
有限元模拟 /
坡膛结构 /
耦合数值求解
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Key words
Engraving Process /
FEM /
Forcing Cone Structure /
Coupling Numerical Simulation
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