Abstract
In this paper, the fault diagnosis for excessive vibration value of LP Rotor in a turbofan engine test is analyzed. The vibration data collected in the test indicates that the amplitude enlarges with the increase in rotation frequency and reaches its maximum value at a certain frequency-doubling point. By various analysis and judgment, the main reason that causes the vibration of engine's high pressure rotor is the blade damage. The conclusion has certain significance for the fault diagnosis for civil aviation engine test.
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