Analysis of the dynamic characteristics of a small caliber gun’s bullet engraving process

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (12) : 241-247.

WANG Shaoquan1， LI Qiang1， FAN Jiangtao1， WEI Liansheng1， QU Zhensen2， XIN Chunhong2

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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.

Key words

Engraving Process / FEM / Forcing Cone Structure / Coupling Numerical Simulation

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WANG Shaoquan1， LI Qiang1， FAN Jiangtao1， WEI Liansheng1， QU Zhensen2， XIN Chunhong2. Analysis of the dynamic characteristics of a small caliber gun’s bullet engraving process[J]. Journal of Vibration and Shock, 2024, 43(12): 241-247

References

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