飞行器内等速初始弯曲转子动力学特性的研究

Dynamic Features of a Maneuvering Initial Bending Rotor at Constant Running Speed

研究了飞行器内等速运行的初始弯曲转子的动力学特性 ,分析了飞行器机动飞行对转子系统振动响应的影响 .数值研究结果表明 :飞行器俯仰角的变化使重力影响发生了变化 ,加上飞行器本身的机动飞行影响 ,转子的动力学特性与地面转子系统的特性有很大的不同 .在飞行器加速初期 ,无论是在垂直方向单独加速或在水平、垂直两方向同时加速 ,转子振幅都会大幅上升 ,然后减小 .

The dynamical characteristics of a maneuvering rotor with initial bending running at a constant speed were studied. The numerical analysis performed with integration of the motion equations shows that the amplitude responses of the rotor system are obviously influenced by the variation of the velocity and/or acceleration of the aircraft, especially the latter. Increasing the vertical component of the speed of the aircraft leads to decreased steady amplitude. At the very beginning of the acceleration of aircrafts, the amplitude increases suddenly and then decreases with fluctuation in most cases except flying and accelerating only in the horizontal direction. During the decline, the amplitude curve appears wave vale in some cases. The results may be used to diagnose initial bending of rotor.