旋转自稳定末敏子弹运动特性分析

为研究某型旋转自稳定末敏子弹运动特性，充分考虑末敏子弹的结构强非对称特点和其初始抛撒条件，引入动不平衡弹体模型，推导超大攻角条件下子弹的空间6自由度弹道方程，计算分析子弹的稳态扫描运动特性。结果表明：子弹体的质量分布非对称和初始抛撒角速度是子弹药实现稳态扫描运动的必要条件；子弹扫描频率只由抛撒角速度ωσ0决定，且和ωσ0正相关；初始俯仰角φa0≥0°时，扫描角整体呈增大趋势，初始俯仰角φa0＜0°时，扫描角整体变化趋势为先减小后增大；扫描面积与配重-全弹质量比、初始俯仰角、初始偏航角和初始角速度呈正相关，与均质圆柱体转动惯量比呈负相关。
In order to study the motion characteristics of a certain type of rotary self stabilizing terminal sensitive submunition, the submunition′s asymmetric structure characteristics and its initial projection condition were fully considered. The dynamic unbalance missile model was introduced to derive the 6 degrees of freedom trajectory equation of the submunition and analyze the characteristics of steady state scanning motion of submunition. Results show that the submunition′s asymmetric mass distribution and the initial angular velocity are the necessary condition for the realization of the steady state scanning. The scanning frequency of the submunition is only determined by the projection angular velocity ωσ0, and is positively correlated with the ωσ0. When the initial pitch angle φa0≥0°, the overall trend of scanning angle is increased, and when φa0＜0°, the scanning angle decreases and then increases. The scanning area is positively correlated with the mass ratio of weight and projectile, the φa0, the initial yaw angle and the ωσ0, and is negatively correlated with the ratio moment of inertia of the center cylinder.