发射时刻对固体火箭海上热发射的影响研究

Research on the Influence of Launch Time on Solid Rocket Offshore Thermal Launch

为探究海浪激励作用下发射时刻对固体火箭热发射过程的影响,建立了固体火箭海上热发射系统柔性化动力学模型。在考虑六自由度海浪激励的基础上,以船舶横摇运动为参照,选择运动特征点作为发射时刻,对比不同船舶状态下火箭发射过载和发射精度。结果表明,选取船舶横摇运动曲线的零点位置发射火箭时,火箭各方向的离轨姿态相对较小,为安全发射时刻,而波谷位置则相对危险。

In order to investigate the effect of launch time on the thermal launch process of solid rocket under the excitation of sea wave, a flexible dynamic model of solid rocket’s maritime thermal launch system was established. On the basis of considering the Six-DOF sea wave excitation and taking the ship’s rolling motion as a reference, the motion characteristic points were selected as the launch time to compare the launch overload and launch accuracy of the rocket under different ship states. The results show that when the zero position of the ship rolling motion curve is selected to launch the rocket, the off-orbit attitude of the rocket in all directions is relatively small, which is the safe launch moment, and the trough position is relatively dangerous.