Effect of mistuned bladed-disk induced by cracked blades on vibration characteristics of aero-engine

ZHANG Huan; ZHU Jing; LIANG En-bo; TENG Guang-rong

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Effect of mistuned bladed-disk induced by cracked blades on vibration characteristics of aero-engine

更新时间：2026-07-07

- Effect of mistuned bladed-disk induced by cracked blades on vibration characteristics of aero-engine
- Vol. 28, Issue 9, (2013)
- 作者机构：
  
  中国航空工业集团公司中国燃气涡轮研究院, 江油,四川,621700
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2013
- 稿件说明：
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ZHANG Huan, ZHU Jing, LIANG En-bo, et al. Effect of mistuned bladed-disk induced by cracked blades on vibration characteristics of aero-engine[J]. 2013, 28(9).
DOI：

ZHANG Huan, ZHU Jing, LIANG En-bo, et al. Effect of mistuned bladed-disk induced by cracked blades on vibration characteristics of aero-engine[J]. 2013, 28(9). DOI：

摘要

某型航空发动机装配有含裂纹叶片的失谐叶盘

基于该型发动机的性能试验

对其排气机匣振动数据进行分析

研究叶盘失谐对发动机转子动力学特性的影响.主要对比了叶盘裂纹长度与整机振动特性的关系

证明了裂纹不仅改变整机振动频率的成分组成

同时

主要频率成分的振动幅值也有较大增加.然而

当裂纹长度比小于0.3

整机振动对叶盘失谐并不敏感

这一论断为在发动机试验中及时判断叶片裂纹故障提供支持.

Abstract

The performance test of an aero-engine assembled with a mistuned bladed-disk induced by cracked blades was researched.The casing vibration data were analyzed to investigate the effect of mistuning on rotor-dynamic characteristics of the aero-engine.The relationship between crack length and aero-engine vibration characteristic was compared.The results prove that cracking induced mistuning not only modifies the vibration frequency composition of the rotor

but also amplifies the response amplitude of each frequency.However

areo-engine vibration characteristics are not sensitive enough to bladed-disk mistuning if the crack length ratio is less than 0.3

so this is helpful for crack diagnosis in aero-engine tests.

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