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攻角对长杆弹斜侵彻有重要影响,该文通过大量数值模拟研究了攻角对长杆弹斜穿透中厚铝板的影响机理。基于实验验证的有限元模型,开展了变速度和攻角的多工况数值模拟,得到了侵彻过程中弹体的减加速度大小、速度方向以及整体弯曲的变化规律,分析了侵彻速度、倾角和攻角对侵彻阻力、弹体弯曲和弹道偏转的影响。结果表明:带攻角斜侵彻时,负攻角对弹体弯曲的影响明显大于正攻角,且弹体弯曲随着侵彻速度的增大而减小;随着斜侵彻速度的增大,攻角引起弹体甩尾和弹道偏转越明显,此时带攻角的斜侵彻过程的能量损耗机理明显不同于正侵彻和无攻角的斜侵彻。
The angle of attack has an important influence on the penetration of the long bar projectile. In this paper, the effect of angle of attack on the diagonal penetration of the long bar through the thick aluminum plate has been studied through numerical simulations. Based on the experimental verification of the finite element model, a numerical simulation of variable speed and angle of attack in multi-conditions was carried out. The changing rules of velocity, velocity direction and overall bending of the projectile during the penetration process were obtained. Effect of Inclination and Angle of Attack on Penetration Resistance, Projectile Bending and Ballistic Deflection. The results show that the influence of negative angle of attack on the bending of the projectile is obviously greater than that of the positive attack angle and the bending of the projectile decreases with the penetration rate increasing. Large, the angle of attack caused by body flick and trajectory deflection more obvious, this time with the angle of attack of the process of oblique penetration energy loss mechanism is clearly different from the penetration and no angle of attack of the ramp.