二级抛撒火箭子母弹散布场及弹道特性分析

Analysis of Fall Point and Trajectory for Twice Throwing Rocket Cluster Warhead

针对子母弹的散布场及子弹飞散过程,使用Gurney公式的修正公式计算中心药管式二级抛撒机构的径向抛撒速度。对二级子弹进行受力及运动分析,建立无旋子弹的3D弹道方程组。使用二级子弹等比例模型风洞实验测量值计算二级子弹气动力参数,为弹道及落点散布计算提供数据支持。使用VC++编写子弹弹道及落点散布程序;得出亚音速抛撒时,随着一级子弹弹道倾角的减小,单枚一级子弹的散布场向正圆变化且二级子弹的横向及射向速度迅速衰减至零,纵向速度衰减至某一值后趋于稳定,二级子弹进入稳定的垂直下降阶段。

Aiming at the fall point of cluster warhead and flying process of sub projectiles. Using the modified Gurney formula to calculate radial Dispersal velocity of central squib type secondary dispersal institutions. Analy- sing the force and motion of secondary sub projectiles, buliding 3D trajectory equations of irrotational sub projec- tiles. Using the wind tunnel test measured value of secondary sub projectiles equal proportion model to calculate the aerodynamic parameters of secondary sub projectiles, provding data support for trajectory and impact point disperse calculations. Using VC ＋ ＋ compile sub projectiles trajectory procedures of sub projectiles trajectory and fall point. When one-level sub projectiles fly in subsonic and the trajectory inclination angle is reduced, the fall point of sec- ondary sub projectiles change from ellipse to circle. The lateral velocity and shooting velocity owned by secondary sub projectile reduce to zero. The longitudinal velocity of secondary sub projectile stabilizes after it reduced to one value. The secondary sub projectiles begin to stable vertical drop.