Nonlinear dynamics analysis of shaft crack
DOI:
https://doi.org/10.63313/AERpc.9037Keywords:
Shaft crack, nonlinear dynamics, dynamic responseAbstract
Considering the “breathing” phenomenon of cracks in a rotor system as the shaft rotates, this study derives the true breathing formula for shaft cracks, adopts more realistic flexural and torsional stiffnesses of the cracked shaft segments, and establishes a time-varying stiffness matrix for the cracked shaft. Subse-quently, a finite element dynamics model of the gear transmission system con-taining gear-shaft-bearing is established to elucidate the dynamic characteristics of the system affected by the shaft crack. The dynamic characteristics of the sys-tem under the influence of shaft cracks are analyzed by changing the crack pa-rameters such as different crack depths and different numbers of cracks.
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