大口径弹体高速入水载荷特性研究  

Study on Load Characteristics of High-speed Water-entry of Large Caliber Projectile

作　　者：汪振 吴茂林[1] 戴文留 WANG Zhen;WU Maolin;DAI Wenliu(College of Arms Engineering,Navy University of Engineering,Wuhan 430033,China;Jiangnan Industrial Group Co.Ltd.,Xiangtan 411207,China)

机构地区：[1]海军工程大学兵器工程学院,湖北武汉430033 [2]江南工业集团有限公司,湖南湘潭411207

出　　处：《弹道学报》2020年第1期15-22,共8页Journal of Ballistics

摘　　要：针对未来海上平台发射大口径抛射体入水冲击载荷问题,为了研究速度接近200 m/s时,不同速度、入水角度以及攻角对大口径平头弹体入水径向载荷以及轴向载荷的影响,基于LS-DYNA软件,采用多介质ALE方法,对速度在150~190 m/s,入水角度在45°~60°之间,具有3°~7°攻角的弹体入水模型进行数值模拟。结果表明:在同一入水速度的情况下,轴向载荷峰值随入水角度的增加而增加,径向载荷峰值随着入水角度的改变有一定的波动;在入水初期,径向载荷到达峰值后慢慢趋于稳定并收敛于0;径向载荷的峰值出现在轴向载荷撞水瞬间产生的第1次小峰值时刻;正攻角会使弹体产生顺时针旋转的径向载荷,负攻角会使弹体产生逆时针旋转的径向载荷,载荷大小随着攻角数值大小的增大而增大。Aiming at the problem of water entry overload of large caliber projectile launched by offshore platforms in the future,the effects of different velocities,water inflow angles,and angle of yaw on the radial and axial loads of large caliber flat-nosed projectiles with the velocity approaching 200 m/s were studied.Based on LS-DYNA software,the multi-medium Arabic Lagrange Euler(ALE)method was used to simulate the water entry model of a projectile with velocity of 150-190 m/s,water inflow angle of 45°-60°and angle of yaw of 3°-7°.At the same velocity,the peak value of axial load increases with the increase of water entry angle,and the peak value of radial load fluctuates with the change of water entry angle.At the initial stage of water inflow,the radial load gradually stabilizes and converges to zero after reaching its peak value.The peak value of radial load occurs at the first small peak moment when the axial load collides with water.The positive angle of attack will cause the radial load of clockwise rotation,while the negative angle of attack will cause the radial load of counter-clockwise rotation.The magnitude of the load increases with the increase of the numerical value of the angle of attack.

关 键 词：大口径弹体 高速入水 流固耦合 

分 类 号：TJ67[兵器科学与技术—武器系统与运用工程]