为减小车载导弹倾斜发射过程中初始扰动的影响,从理论角度建立了扰动数学模型,运用三维建模软件和有限元分析方法,构建了车载导弹刚柔耦合动力学模型。通过仿真分析,获得了发动机推力不稳定、燃气流冲击对导弹运动参数的影响情况。结果表明,发动机推力不稳定是造成导弹初始扰动的主要因素。模型较好的反映了导弹实际发射过程,研究结果为减小初始扰动、提高发射精度提供理论参考。

Aimed at the influence of initial disturbance in the process of sloping launching of vehicular missile, disturbance mathematics model is established from theory point of view, and three-dimensional model software and finite element analysis method are used to build vehicular missile rigid-flexible coupling dynamic model. Through simulated analysis, influence curve of missile movement parameters from instability of engine power, shock of gas flow are gained. According to the results, the instability of engine power is the main source of initial disturbance. The model sensitively reflects launching process of missile and the results provide theoretical references for decreasing initial disturbance and increasing launching accuracy.