空气动力非对称弹丸大攻角旋转共振运动研究及应用  

Research on Large Angle-of-attack Spin Resonance Movement of Aerodynamic Asymmetric Projectile

作　　者：舒敬荣 张继春[1] 常思江[2] 

机构地区：[1]陆军军官学院二系,安徽合肥230031 [2]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《兵工学报》2014年第4期441-447,共7页Acta Armamentarii

基　　金：国家自然科学基金项目(11272356);中国博士后科学基金项目(2012M521842)

摘　　要：弹丸旋转时,空气动力非对称会对弹丸的角运动产生周期性的强迫干扰,在一定条件下,可以形成弹丸纵轴相对于速度矢量成一定角度的旋转运动,这种旋转运动可用于实现无伞末敏弹的稳态扫描。在考虑弹丸所受非对称空气动力与其他力和力矩的前提下,建立了弹丸的运动微分方程,推导出了复数形式的攻角方程。以攻角方程为基础,探讨了弹丸形成稳定旋转共振状态的条件。针对某空气动力非对称弹丸进行了仿真计算,结果表明:空气动力非对称弹丸在一定条件下可以形成旋转共振运动,为无伞末敏弹的气动设计提供了理论参考。The aerodynamic asymmetry can produce a periodic forced interference to the angular motion of projectile when it rotates. Under certain conditions, this can form a rotating motion of the projectile longitudinal axis relative to the velocity vector in which the angle between the long itudinal axis and the velocity vector is fixed. This kind of rotating motion can be used to realize the stable scanning of terminal sensitive ammunition. On the premise of considering the forces and moments, including asymmetric aerodynamic force and moment, the motion differential equation of projectile is established, and the angle-of-attack equation in complex number form is derived. On the basis of angle-of-attack equation, the conditions under which projectile can form stable spin resonance movement are discussed. The simulating calculation of a certain aerodynamic asymmetric projectile is performed. The result shows that aerodynamic asymmetric projectile can form spin resonance movement under certain conditions, which provides theoretical support to the pneumatic design for terminal sensitive ammunition.

关 键 词：兵器科学与技术 空气动力非对称 非对称弹丸 旋转共振 大攻角 末敏弹 

分 类 号：TJ410.1[兵器科学与技术—火炮、自动武器与弹药工程] TJ012.3