含裂纹叶片的失谐叶盘对航空发动机振动特性的影响

张欢; 朱靖; 梁恩波; 滕光蓉

含裂纹叶片的失谐叶盘对航空发动机振动特性的影响

中国航空工业集团公司中国燃气涡轮研究院, 四川江油621700

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出版历程
- 收稿日期: 2012-10-10
- 刊出日期: 2013-09-28

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

China Gas Turbine Establishment, Aviation Industry Corporation of China, Jiangyou Sichuan 621700, China

摘要

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.
- 失谐叶盘 /
- 裂纹长度 /
- 裂纹叶片分布 /
- 振动监测 /
- 故障诊断
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.
- mistuned bladed-disk /
- crack length /
- cracked blade distribution /
- vibration monitoring /
- fault diagnosis

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参考文献(15)

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