Asymmetric factors lead to lateral-directional departure after catapult launch,and affect longi-tudinal flyaway characteristics as well.Principle analysis and numerical simulation are conducted to reveal ya-wing movement characteristics during deck run and lateral-directional departure characteristics in catapult flya-way,with the consideration of three typical factors, such as off-center position, catapult runway angle and deck roll.According to the safety requirements of sink off bow and bank angle,safe wind over deck(WOD) envelope is figured through numerical simulation under different takeoff conditions.Simulation results indicate that lower boundary of the envelope is limited by maximum sink off bow,left and right boundary is restricted to maximum bank angle, and upper boundary is determined by constant wind at sea level.The range of safe WOD's direction and speed would be obviously narrowed due to off-center position or deck roll.%非对称因素会导致舰载机在弹射后出现横航向偏离,并影响其纵向起飞航迹.针对定位偏心、弹射道偏角、甲板横摇等3类扰动因素,开展了这些非对称因素对飞机弹射起飞特性影响规律的理论分析与仿真计算,掌握了飞机在甲板滑跑段的偏航运动特性以及离舰上升段的横航向偏离特性.基于弹射起飞后飞机航迹下沉量与滚转角2项安全性要求,通过仿真计算建立了安全甲板风(WOD)包线,结果表明:安全甲板风包线的下边界由最大航迹下沉量约束,左右边界由最大滚转角限制确定,上边界由最大海面风速决定;定位偏心、甲板横摇等非对称因素将显著缩小安全甲板风包线的风速和风向角范围.
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