| 刘海，娄金伟，胡伟，王洪斌.基于叶尖定时原理的整体叶盘振动测试与分析[J].航空发动机,2021,47(6):74-79 |
| 基于叶尖定时原理的整体叶盘振动测试与分析 |
| Vibration Test and Analysis of Blisk Based on Tip-timing Theory |
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| DOI： |
| 中文关键词: 整体叶盘 叶片振动 叶尖定时 行波分析 非同步振动 航空发动机 |
| 英文关键词:blisk blade vibration tip-timing traveling wave analysis asynchronous vibration aeroengine |
| 基金项目:航空动力基础研究项目资助 |
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| 中文摘要: |
| 针对某发动机整体叶盘风扇部件第1级转子叶片振动故障，应用基于叶尖定时原理的多通道非接触叶片振动测试系统
对不同气动状态、不同运行转速下叶片振动参数进行测量，采用整级叶片行波分析方法分析得到了整体叶盘转子叶片的振动形式
以及叶片振动随风扇气动状态和运行转速的变化规律。测试分析结果表明：该整体叶盘转子叶片在多个转速下存在非同步振动，
同时静子参考系可观察到前行波，叶片振动频率、激振因素及振动节径均随转速变化，叶片振动Campbell图存在2条明显的激振
线，与叶片2弯和1扭振型频率线基本一致。通过测试分析可知振动激励源为宽频激励，且与试验件静子结构激振因素无关。可
通过提高叶片自身刚度、强化阻尼效果、降低弯扭耦合来改善叶片振动特性。 |
| 英文摘要: |
| Aiming at the vibration fault of the first stage rotor blade of an engine blisk fan components，a multi-channel non-contact
blade vibration test system based on the tip-timing theory was used to test the blade vibration parameters under different aerodynamic states and different operating speeds. Using the all-blade travelling wave analysis method，the vibration form of blisk rotor blade and the variation law of blade vibration with the fan aerodynamic state and operating speed were obtained. The test and analysis results show that the rotor blades of the blisk have asynchronous vibration at multiple rotating speeds. At the same time，the forward traveling wave can be observed in the stationary reference frame，and the blade vibration frequency，excitation factor and vibration nodal diameter change with the rotating speed. There are two obvious excitation lines in the Campbell diagram of blade vibration，which are consistent with the frequency lines of the second bend mode and the first torsion mode of blades. Through the test and analysis，it can be seen that the vibration excitation source is broadband excitation，and independent of the excitation factors of the test piece stator structure. The blade vibration characteristics can be improved by improving the blade stiffness，strengthening the damping effect and reducing the bending torsion coupling. |
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