【摘要】 针对超空泡射弹火炮武器在航空反水雷作战中的应用,基于有限元分析软件Abaqus耦合欧拉-拉格朗日方法,开展射弹高速入水过程的数值模拟研究。通过对射弹垂直入水过程的数值模拟,获得高速入水载荷的一般形式;分析射弹倾斜入水过程中入水空泡的包覆状态与入水载荷、入水姿态变化之间的耦合关系,揭示射弹入水尾拍这一动态稳定运动的形成机理。不同入水攻角下射弹高速入水尾拍的仿真结果表明,在相同发射状态下,入水攻角是影响射弹密集度的重要因素。更多还原

【Abstract】 For the use of supercavitation projectile artillery weapon in anti-mine operations,the numerical simulation of high speed water-entry process of projectile is studied based on coupled Eulerian-Lagrangian method.The general form of its load was obtained by studying the vertical water-entry process of projectile.The formation mechanism of tail-slapping is revealed through the analysis of the coupling relationship among covering state of cavity,water entry impact load,and change of projectile attitude in oblique water-entry process of projectile.The numerical study of the high-speed water-entry of projectile at different angles of attack shows that the angle of attack is an important factor affecting the projectile ’s dispersion.更多还原