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在螺桨盘转子系统的颤振涡动研究中,系统的安装刚度对转子的颤振涡动失稳有着重要的作用.对于飞机发动机,实际安装情况十分复杂,发动机短舱.安装节、机翼等对螺桨盘转子的运动均有影响.所以,在颤振涡动研究中,必须考虑轴头的动刚度.轴头的动刚度是通过动柔度转换而来的,而在动柔度的实验测量中必须解决几个技术问题,首先是提高信噪比.其次是消除工艺夹具带来的附加质量和附加转动惯量的影响,从而提高动刚度系数的测量精度.本文通过对模型转子以及某实际桨轴发动机转子轴头动刚度系数的测量及处理,阐述轴头动刚度矩阵的测量方法,以及有关技术问题的处理过程.
In the study of chatter vortex of propeller disk rotor system, the rigidity of the system is very important to the flutter and vortex instability of the rotor.For the aircraft engine, the actual installation situation is very complicated, the engine nacelle, mounting section, machine Wing and so on have an effect on the movement of the propeller rotor.Hence, in the study of flutter whirl, the dynamic stiffness of the shaft must be considered.The dynamic stiffness of the shaft head is converted by dynamic flexibility, Degree of experimental measurement must solve several technical problems, the first is to improve the signal to noise ratio.Secondly, to eliminate the additional quality and additional inertia caused by the impact of the fixture, so as to improve the measurement accuracy of dynamic stiffness coefficient.This paper through the model rotor As well as the measurement and treatment of dynamic rigidity coefficient of rotor shaft of an actual propeller shaft, the measurement method of dynamic stiffness matrix of shaft head and the treatment process of related technical problems are expounded.