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).
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:
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.