附着空泡对潜射导弹弹道影响分析

Analysis on Influence of Attached Cavity on the Trajectory of Submarine Launched Missile

为了研究附着空泡对潜射导弹弹道的影响,根据潜射导弹肩空泡尾段压力分布特性,建立了弹体运动方程,分析了潜射导弹弹体所受外力和外力矩,建立了肩空泡尾段横向力模型。通过对潜射导弹所受流体动力进行建模,求解导弹运动方程,得到不同工况下的水弹道结果。将采用弹道计算模型得到的结果与同工况试验结果进行了比较分析,结果表明,由于空泡发展不对称引起的空泡尾段横向力对弹体扶正具有较大影响,相较于发射深度、出筒速度,迎背流空泡长度差对出水俯仰角及俯仰角速度影响更大。

To study the influence of attached cavity on the trajectory of submarine launched missile （SLM）, the motion equations of SLM was established, and the external force and external moment were analyzed according to the characteristic of pressure distribution. The transverse force model at rear of nose cavity was established. By modeling hydrodynamic forces and solving the movement equation of missile, trajectory results under different conditions were obtained. The results obtained by trajectory calculation model were compared with the experiment results under the same conditions. The results show that transverse force at rear of cavity caused by cavity＇s asymmetric development has great influence on the missile＇s being righted. Cavity length difference between incident and suction side has exiting water than launched depth and tube-exit more effect on pitching angle and pitch rates of velocity.