为弄清斜侵彻时攻角对弹道的影响,应用LS-DYNA有限元仿真软件对弹体正、斜侵彻混凝土靶板过程进行了三维数值模拟,通过比较正侵彻时仿真结果与Young经验公式计算结果,验证了有限元模型的合理性,而后通过改变弹体侵彻角度和弹速方向,研究了斜侵彻条件下攻角对弹道形状、侵彻深度及爆炸效果的影响。结果表明:斜入射时正、负攻角对应弹道形状差别较大;绝对值相等的情况下,正攻角的侵彻深度及爆炸效果均优于负攻角。

In order to study the influence of attack angle on trajectory in the instance of oblique penetration, the process of projectile penetrating plumb and obliquely into concrete target was numerically simulated by the finite element code LS-DYNA. Rationality of finite model was validated by comparing the simulated results with calculated results of Young experiential formula in the instance of plumb penetration. Then the influences of incidence angle and attack angle on trajectory figure, penetration depth and blast effect were studied by changing the direction of penetration and velocity. The results indicate that the positive and minus attack angle make a great difference in trajectory figure of oblique penetration; the penetration depth and blast effect of positive attack angle is better than minus attack angle.