含裂纹叶片的失谐叶盘对航空发动机振动特性的影响  

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

作　　者：张欢[1] 朱靖[1] 梁恩波[1] 滕光蓉[1] 

机构地区：[1]中国航空工业集团公司中国燃气涡轮研究院,四川江油621700

出　　处：《航空动力学报》2013年第9期2076-2082,共7页Journal of Aerospace Power

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.The performance test of an aero-engine assembled with a mistuned bladeddisk 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.

关 键 词：失谐叶盘 裂纹长度 裂纹叶片分布 振动监测 故障诊断 

分 类 号：V216.21[航空宇航科学与技术—航空宇航推进理论与工程]