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在Jeffcott转子的开闭裂纹及方波模型基础上,建立了飞行器内裂纹转子系统的运动模型· 数值研究表明:当飞行器以不同的等速度飞行时,转子轴与水平面之间夹角的变化将造成重力分量的变化,从而使转子运动在周期解、拟周期或浑沌状态之间变化,而且出现非线性现象的转速比、刚度变化比等参数的范围、进入和退出浑沌的路径、响应中的频率成份也会发生变化· 飞行器的飞行速度变化还会改变裂纹转子响应的稳定性· 飞行器等速飞行后的加速过程将引起转子振幅的突升及其后的下降,而且会使裂纹转子系统响应可能在不同的非线性状态下交替改变·
Based on the open and close crack and square wave model of Jeffcott rotor, the motion model of the cracked rotor system in the aircraft is established. The numerical study shows that when the aircraft is flying at different constant velocities, the change of the included angle between the rotor shaft and the horizontal plane Resulting in changes in the gravity component, so that the rotor movement in the periodic solution, quasi-periodic or chaotic state changes, and the emergence of non-linear phenomena such as speed ratio, stiffness variation ratio range of parameters, enter and exit the path of chaos, response In the frequency of the composition will change · aircraft flight speed changes will change the stability of the crack rotor response · The acceleration process of the aircraft after the constant speed flight will cause the rotor amplitude to rise and then drop, and will make the crack rotor The system response may change alternately in different non-linear states