大口径防爆弹弹带挤进过程仿真与分析

Simulation and Analysis of Band Engraving Process for Large-Caliber Explosion-Proof Bullet

防爆弹的弹带挤进过程是其在内弹道运动过程中的重要组成部分,弹带挤进时期的应力应变情况对提高火药气体密封、弹丸出膛初速等具有重要影响。根据Von Mises屈服准则,建立了防爆弹3D结构模型和材料模型看,利用显式动力学分析软件ANSYS/Explicit Dynamics对3D模型进行了有限元分析,得到挤进过程中弹带的应力集中区域和变形情况。根据受力平衡,计算了防爆弹动态挤进阻力。数值仿真实验结果为防爆弹弹带、身管设计提供了一定的理论依据。

Explosion-proof bullet band engraving process is an important part of the interior ballistic moving process,and the engraving period of stress and strain have important effects on improving the propellant gas seal,the projectile muzzle velocity and so on. Firstly,according to the Mises Von yield criterion,we established the 3D structure model and material model. By using the explicit dynamic analysis software ANSYS/Explicit dynamics,we analyzed the 3D models and got the stress concentration and deformation region in the engraving process. Finally,according to the force balance,we computed the dynamic engraving resistance. The experimental results of numerical simulation provide a theoretical basis for the design of explosion proof and body tube.