Аннотации:
The detection of a growing fatigue crack of a shaft is based on the vibrodiagnostic analysis of the system consisting of the rotors, flexible shaft supported by the ball bearings. The purpose of these investigations is to development the diagnostic method of the crack location and determination of its depth. Experimental results have been obtained for different depth of the crack - 5%, 10%, 15% and 30% from shaft diameter. Experimental results shown that when a cracked occurs in the rotor system, it can be detected by the experimental vibrosignals at its early stage. The vibroaccelerations of the rotor system were recorded and converted in digital forms and used in finiteelemental model. Experimental results shown that when a cracked occurs in the rotor system, it can be detected by statistical characteristics with help of the data from experimental and theoretical modal analysis at its early stage. The further increase of the crack can be observed that statistical characteristics are increase in wide-band signals that was investigated in other researches.
