叶片盘的旋转失速振动响应分析

 稳定气动力状态下的叶片盘的模型由连续系统组成。利用弹性和波动理论以获得叶片盘响应。响应是带有波动模态阻尼的模态解。由模态解,可以得到共振相对转速的表示方法和解释试验中的某些现象,此外,讨论了在气流稳定和失速状态下的广义共振情况。最后得出的结论是:在均匀稳定气流中不出现波动响应,但在失速流动下,波动响应呈随机的波动振动,而此时不产生驻波共振。

ANALYSIS OF STALL VIBRATION RESPONSE OF ROTATING BLADE-DISK

The results of an investigation of rotaing bladed-disk under stationary aerodynamic status are presented. A bladed-disk model is of continuous system. The traveling wave response of bladed-disk is obtained by using the elastic and wave theory. The response is a modal solution with wave modal damping, From modal solution, the formulation of resonant rotative speed can be obtained and some phenomena in test can be illustrated. Meanwhile, general resonant conditions are discussed in stationary and stall flows. The conclusion is that the travelling wave respose doesn't appear in uniform stationary flow.In stall flow, the travelling wave response is a random wave vibration, in this moment, the stationary wave resonance can not be produced.