火炮发射与控制学报

为探究弹体结构变形与初始攻角耦合导致的弹道失稳问题，基于修正的侵彻阻力函数，采用弹靶分离数值模拟方法，系统研究了结构变形对带攻角弹体侵彻混凝土薄靶弹道偏转的影响。重点分析了初始速度、攻角、侵彻倾角及靶板厚度对弹道偏移量和弹体偏转角的影响。结果表明：结构变形会显著加剧弹道偏转，偏移量与偏转角随初始速度增加整体呈线性增长；正倾角存在时负攻角工况下引发的偏转效应较正攻角更为明显；靶板厚度对弹道特性存在一定的阈值效应，超过临界值后能有效束缚弹体姿态变化，提升弹道稳定性。研究量化了结构变形对弹道稳定性的影响程度，可为钻地弹的弹道控制与结构优化设计提供理论支撑。

To investigate the trajectory instability induced by the coupling effect between projectile structural deformation and initial angle of attack, this study adopts a projectile-target separation numerical simulation method based on a modified penetration resistance function to systematically explore the influence of structural deformation on the trajectory deflection of projectiles with an angle of attack during penetration into thin concrete targets. The effects of initial velocity, initial angle of attack, penetration inclination angle and target plate thickness on trajectory offset and projectile deflection angle are comprehensively analyzed. The results indicate that structural deformation substantially aggravates trajectory deflection. Both trajectory offset and projectile deflection angle exhibit an approximately linear increasing trend with the growth of initial velocity. For a positive penetration inclination angle, a negative initial angle of attack produces a more significant deflection effect than a positive one. Additionally, target plate thickness presents a threshold effect on trajectory characteristics: exceeding the critical thickness can effectively constrain the attitude variation of projectiles and enhance trajectory stability. This study quantifies the influence of structural deformation on projectile trajectory stability,providing a theoretical basis for the trajectory control and structural optimization of earth-penetrating projectiles.