弹体纵向静稳定问题是总体(结构)设计中重要的课题之一。火箭在大气中高速运动,弹体受空气动力的影响很大。弹体越长,弯曲刚度越低,使弹体弹性变形越严重,从而可能丧失弹体的静稳定性,最终导致发射失败,因此,在总体设计中要考虑弹体的稳 Longitudinal static stability of the projectile is one of the most important issues in the overall (structural) design. The rocket moves at high speed in the atmosphere, and the projectile is greatly influenced by aerodynamics. The longer the projectile, the lower the bending stiffness, the more serious elastic deformation of the projectile may lead to the possibility of losing the static stability of the projectile, which eventually leads to the failure of launch. Therefore, in the overall design, the stability of the projectile must be considered