大水深垂直发射航行器水弹道稳定性分析

为使航行器在水下运动姿态及轨迹不偏离理论弹道，对大水深自浮式垂直发射航行器弹道稳定性进行研究。结合水下发射航行器运动稳定性理论分析方法，对其进行稳定性数值仿真分析，针对浮力项在航行器自浮式垂直发射过程中对弹道稳定性所起的作用，研究航行器浮心位置对水弹道稳定性的影响。结果表明：对于静不稳定的航行器，浮心位置设计必须在质心前，并满足浮力矩可以抵抗定常流体力矩干扰才能满足航行器的稳定性要求。该研究为航行器流体结构布局设计和水弹道稳定性设计奠定了基础。

Stability Studies of Trajectory of Launched Vehicles Under Deep Water

In order to prevent the vertical launched vehicles under deep water departing from trajectory in theory, the stability of trajectory is studied. Based on the stability theory and underwater trajectory model, the stability is simulated and analyzed in different conditions. Due to the buoyancy-term is important to the stability of uncontrolled vertical launched vehicles, the influence on stability of trajectory of the center of buoyancy is studied, and impact of determination of the relation among the three center of mass, pressure and buoyancy upon stability of trajectory can be clarified, and the center of buoyancy must be in front of the mass center and the determination of them must be long enough for vehicle with relaxed static stability. The study may contribute to the engineering design of hydrodynamic structural layout and the stability studies of trajectory in theory.