初始偏心距对舰载机弹射起飞的影响

Effect of Carrier-based Aircraft with Initial off-center Catapult Take-off

在弹射起飞准备阶段,舰载机轴线并不能准确地与弹射轨道重合,产生一定的偏心距。为了分析舰载机不同初始偏心距下的弹射起飞的动态特性,以某轻型舰载机为例,建立了舰载机弹射起飞六自由度动力学模型,仿真分析了不同初始偏心距对舰载机姿态运动、弹射杆受力、起落架受力的影响。计算结果表明,初始偏心距对舰载机姿态中的偏航运动影响最为显著,随着初始偏心距的增大,偏航幅值增大,侧向力增大,主起落架垂向受力差值增大,但初始偏心距对舰载机的俯仰运动的影响较小。

In the preparation stage of catapult take-off, the axis of carrier-based aircraft can not coincide with the ejection track well, resulting in a certain eccentricity.In order to analyze the dynamic characteristics of carrier-based aircraft under initial eccentricity, a light carrier-based aircraft was taken as an example, the six-degree-of-freedom dynamics model of carrier-based aircraft catapult take-off was established, and the effects of initial off-center distance on the attitude motion of carrier-based aircraft, the force of ejection rod and the force of landing gear were simulated and analyzed.The results show that the initial off-center distance has the most significant effect on the yaw motion in the attitude of the carrier aircraft.With the increase of the initial off-center distance, the yaw amplitude and lateral force increase, and the difference of vertical force on both sides of the main landing gear increases, but the initial off-center distance has little effect on the pitch motion of the carrier-based aircraft.