弹体侵彻作用下液舱舱壁压力载荷的试验研究

Experimental study on pressure load of tank bulkhead under penetration of projectile

弹体打击作用下的瞬态压力波是舰艇防护液舱、飞机燃油舱等液舱面临的重要威胁.本文通过开展不同弹头形状的弹体侵彻液舱的试验,获得了前后壁板的压力曲线,分析了舱壁不同位置的压力分布现象,研究了舱壁不同位置、不同弹头形状、不同弹体入射速度对冲击波峰值和冲量的影响.结果表明,(1)距离弹道中心距离相当位置处,后壁板上的冲击波峰值和冲量明显大于前壁板,且存在明显的二次加载现象,其中角隅处最明显;(2)液舱前后壁板冲击波峰值、冲量均随弹体入射速度增加而线性增大;(3)平头弹形成的冲击波峰值及冲量最大,半球头弹次之,卵形弹最小,且卵形弹较容易发生弹道偏转.

Hydrodynamic ram is an important threat to the liquid containing structures such as the ship’s protective liquid tank and the aircraft’s fuel tank. Through the experiments of different projectiles penetrating liquid tank, the pressure curves of the front and rear plates are obtained, the pressure distribution characteristics of the plates are analyzed, and the effects of different positions, shapes and velocities on the peak value and impulse of the shock wave are compared. The results show that:(1) the peak value and impulse of the shock wave on the rear plate are obviously larger than that on the front plate, and there is an obvious secondary loading phenomenon, among which the corner’s is the most obvious;(2) the peak value and impulse of the shock wave on the front and rear plates of the liquid tank increase linearly with the increase of the incident velocity of the projectile;(3) the peak value and impulse of the shock wave formed by the flatnosed projectile are the largest, while the spherical-nosed projectile is the second, and the ogive-nosed projectile is the smallest. In addition, ballistic deflection of the ogive-nosed projectile is more likely to occur.