舰载机偏中心定位弹射起飞动力学分析

Dynamics Analysis of Carrier-Based Aircraft with Off-Center Catapult Launch

考虑起落架缓冲和轮胎弹性,建立了六自由度偏中心定位弹射起飞数学模型,研究了偏中心定位弹射起飞过程中飞机姿态的变化,分析了不同初始偏心距离对起落架载荷的影响。结果表明:初始偏心距离对弹射过程中飞机的俯仰运动影响较小,而对滚转和偏航运动影响较大;相对于滚转运动,偏航运动有更明显的衰减趋势;滚转运动导致两侧主起落架载荷差异随初始偏心距离的增大而增大。

Considering landing gear cushion and flexible tires,a six-degree-of-freedom mathematic model for carrier-based aircraft with off-center catapult launch is established.The aircraft attitude during catapult taxing is studied.The landing gear load affected by the off-center distance is also analyzed.From the off-center catapult launch calculation,three important conclusions are obtained： the roll and yaw movements are affected by the initial off-center distance,while the pitch movement is slightly affected.The attenuation of the yaw movement is more clear than the roll movement.The difference between loads of two main landing gears caused by the roll movement is increased with the increase of the initial off-center distance.