大长径比弹箭在飞行时的柔性变形特性分析

对于远程火箭和杆式穿甲弹这类细长飞行体来说 ,随着弹体长径比的增大和飞行速度的提高 ,其在空中的柔性变形已经不可忽略 ,变形的大小可能远超过弹箭设计时所允许的公差 ,将严重影响弹箭的飞行性能。本文提出了大长径比弹箭在飞行时柔性弯曲的动力学模型和有限元模型 ,并对柔性变形进行了仿真分析 ,讨论了飞行速度和长径比等参数对飞行体变形的影响。研究结果对细长弹箭的设计具有一定参考价值

AN ANALYSIS ON THE FLEXIBILITY IN FLIGHT OF PROJECTILES OR ROCKETS HAVING HIGH L/D RATIOS

With the increase in the ratio of length to diameter and the velocity of flight for fin stabilized rod penetrators and long range rockets, the flexible deformation of the missile body and its effects on the ballistic performance have attracted more attention. In this paper the dynamic equations and the finite element model of flexible projectiles or rockets is presented. By way of an illustration, the dynamic deformation of the missile body, effects of initial velocity and L/D ratio on its flexible deformation, and effect of this flexibility on the ballistic performance are simulated and analyzed, some important results are thus reached at.