摘要
在火箭弹外弹道主动段模型中,火箭弹的转动惯量是随时间变化的,文中分析了这种变化,并在火箭弹外弹道主动段模型中考虑了这种变化。为便于定性的数值分析,将主动段模型在合理假设的条件下进行了模型简化。通过远程尾翼稳定旋转火箭弹的数值计算分析,由于主动段模型中,将转动惯量的变化忽略,将给火箭弹绕纵轴的角速度带来4%左右的误差。因此,在建立远程火箭弹主动段弹道模型时,不能将转动惯量随时间的变化作为一小量而忽略掉。
At the modeling of an initiative external ballistic of a rocket projectile,the changing of the moment of inertia with time is analyzed and added into the model of the initiative external ballistic in this paper.With reasonable hypothesis,the model of the initiative external ballistic is predigested for easy to qualitative numerical analysis.With a numerical calculation of a long-distance finned rocket with low span rate,the span rate of the rocket is error with 4 percent if we neglected the changes fo the moment of inertia at the initiative external ballistic model.We cannot neglect the changes of the moment of inertia at the modeling of long-distance rocket projectile.
出处
《弹箭与制导学报》
CSCD
北大核心
2003年第S3期316-317,320,共3页
Journal of Projectiles,Rockets,Missiles and Guidance
