机动飞行条件下双盘悬臂转子的振动特性

本文取双盘悬臂转子为分析对象 ,建立了水平盘旋和俯冲拉起两种机动飞行条件下转子振动的运动微分方程 ,并用四阶龙格库塔法进行了求解。结果表明 ,机动飞行在转子上产生的附加离心力和附加陀螺力矩将使转子产生较剧烈的瞬态振动 ;同时 ,转子的轴心轨迹中心会偏离轴线 ,使得转子产生明显的变形。因此 ,在分析转子振动特性时 ,应考虑机动飞行的影响

The Vibration Performance of the Double-Disk Cantilever Rotor in Flight Mission

Previous researches on the vibration performance of the double disk cantilever rotor (DDCR) haven't considered the flight mission's influence.But sometimes the performance of DDCR in flight is quite different from the ground test,especially for those fighter planes with great maneuver.In order to study the flight mission's influence,we set up the motion differential equations for two kinds of flight mission,horizontal hover and vertical dive hike.Rugger Kutta method is used to solve the equations.The initial conditions are all set zero.The effects of the flight mission on the vibration performance of DDCR are calculated and analyzed.In general,the flight mission will add centrifugal force and gyroscopic moment on the rotor,which will make the rotor vibrate transiently and will deflect the orbit of the axial center from the axis.The amplitude of the transient vibration is nearly 50% higher than that of stable state in this example.Meanwhile,the shaft will deform evidently.So,the influence of the flight mission on the rotor should not be neglected.