含裂纹叶片的轴流式压气机整体叶盘振动特性分析

陈香; 朱靖; 张亚

doi:10.13224/j.cnki.jasp.2015.05.015

含裂纹叶片的轴流式压气机整体叶盘振动特性分析

doi: 10.13224/j.cnki.jasp.2015.05.015

中国航空工业集团公司中国燃气涡轮研究院, 四川江油 621703

详细信息

作者简介:
陈香(1980-),女,四川德阳人,高级工程师,硕士,主要从事航空发动机振动测试技术研究.

中图分类号: V231
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出版历程
- 收稿日期: 2013-12-04
- 刊出日期: 2015-05-28

Vibration characteristics analysis of blisk with cracking blades on axial flow compressor

China Gas Turbine Establishment, Aviation Industry Corporation of China, Jiangyou Sichuan 621703, China

摘要

摘要: 某型轴流式压气机性能试验过程中出现转子叶片裂纹故障.结合该型压气机结构特点,分析了振动响应的时域信号、频域信号以及高频成分出现的频率波动现象,总结了含裂纹叶片的轴流式压气机整体叶盘振动特性.分析结果显示:含裂纹叶片的整体叶盘使得轴流压气机振动响应呈现非线性特性;振动频谱中出现共振峰分离现象,表明叶片裂纹引起轴流压气机1级转子叶盘出现结构失谐;随转速升高,两个共振峰对应频率均出现波动现象(波动周期分别约为8s和9.2s),叶片裂纹不断扩展且数量增加,整体叶盘失谐程度不断加深,整体叶盘系统出现低阶模态局部化现象.
- 叶片裂纹 /
- 轴流式压气机 /
- 整体叶盘 /
- 非线性 /
- 共振峰分离 /
- 失谐
Abstract: Crack fault of rotor blades occurred during performance experiment of an axial flow compressor. According to the structure characteristics of the compressor, the time-domain signal, frequency-domain signal of vibration response and high-frequency fluctuation were analyzed, and vibration characteristics of blisk with cracking blades on axial flow compressor were summarized. The results show that the blisk with cracking blades can cause vibration response of the axial flow compressor to present the nonlinear characteristics and the splitting of formant in the vibration frequency range, indicating the blade crack could induce mistuning of the first-stage rotor blisk of the axial flow compressor. With the rise of the speed, the frequencies of two formants fluctuate (periods of fluctuation about 8s and 9.2s respectively), and the blade crack grows and the number of cracking blades increases, so the mistuning extent of the blisk increases and modal localization of low order modes of the blisk appeares.
- blade crack /
- axial flow compressor /
- blisk /
- nonlinear /
- splitting of formant /
- mistune

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参考文献(18)

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