大口径火炮膛线结构对滑动弹带弹丸膛内运动影响的数值分析

Numerical Analysis of Influence of Rifling Structure of Large Caliber Gun on Moving of Projectile with Sliding Driving Band in Bore

以大口径身管火炮发射减旋滑动弹带制导弹药时弹丸-身管耦合系统为研究对象,基于弹塑性有限元理论,建立某大口径火炮线膛身管与制导炮弹耦合动力学有限元模型。数值计算了渐速膛线、等齐膛线、混合膛线(渐速膛线+等齐膛线)3种不同膛线形式和深、浅两种膛线深度条件下,制导炮弹在挤进阶段和膛内运动过程中的弹炮应力、挤进阻力以及弹炮动力学响应,获得了大口径火炮膛线结构对滑动弹带制导弹丸膛内运动的影响关系,为弹炮一体化设计提供了理论参考。

A projectile-barrel coupled system of large caliber gun for launching a guided projectile with sliding driving band is studied. A guided projectile-barrel coupled dynamic finite element model of some large caliber gun is established based on elastic and plastic finite element theory. The projectile stress,squeezing resistance,and dynamic response between projectile and barrel in the process of projectile squeezing into rifling grooves and the process of straight moving of guided projectile in bore considering increased twist rifling,uniform twist rifling and increasing-uniform combined rifling,as well as deep rifling and shallow rifling are calculated. The relationship between the rifling structure of large caliber gun and the motion of guided projectile in bore is obtained.