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针对某型弹射座椅建立了考虑风速的弹射过程动力学模型。选取不同风速风向和不同弹射速度作为计算状态,对弹射救生过程进行数值仿真,根据仿真结果分析风对弹射座椅救生性能的影响。通过在低速和中速两个弹射速度下,前向风、侧向风和大气垂直运动对弹射座椅救生性能影响的分析可知:较大的逆风不但会降低伞衣充满的轨迹高度,而且会产生人伞系统的振荡和摇摆,对安全救生存在一定的影响;大气的垂直运动对弹射救生系统的救生性能影响最大,它直接影响到救生系统的纵向运动轨迹。研究结果表明:前向风、侧向风和大气垂直运动均会对弹射座椅的救生性能产生不利影响,在真实的弹射过程中必须考虑风速对弹射救生性能的影响。
For a certain type of ejection seat, a dynamic model of ejection process considering the wind speed is established. According to the simulation results, the influence of wind on the life-saving performance of the ejected seat is analyzed. The analysis of the influence of vertical wind, lateral wind and atmospheric vertical motion on the life-saving performance of the ejected seat at low and medium ejecting velocities shows that larger headwind not only reduces the full trajectory height of the canopy, The oscillation and swing of the parachute system have some impact on safety rescue. The vertical movement of the atmosphere has the greatest impact on the life-saving performance of the catapult rescue system, which directly affects the longitudinal trajectory of the life-saving system. The results show that the forward wind, the lateral wind and the vertical movement of the atmosphere all have an adverse effect on the life-saving performance of the ejected seat, and the influence of the wind speed on the ejection life-saving performance must be considered during the true ejection process.