Dynamic Characteristics Analysis of a Coupled Multi-crack Rotor System



Xiong, Libo, Hua, Chunrong, Yang, Funing, Dong, Dawei and Ouyang, Huajiang ORCID: 0000-0003-0312-0326
(2022) Dynamic Characteristics Analysis of a Coupled Multi-crack Rotor System. .

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Abstract

<jats:title>Abstract</jats:title> <jats:p>This paper establishes a coupled model for multi-crack rotor using Timoshenko beam element with six degrees of freedom, and derives the stiffness matrix in the equations of motion accounting for the coupling between multiple cracks (the interaction between cracks). Then the effects of crack orientation angles (the relative angle between cracks, γ) on dynamic characteristics of the coupled multi- crack rotor near 1/3 and 1/2 subcritical speeds are analysed. The coupling between cracks induces more complex nonlinear dynamic characteristics such as large magnitudes of the super-harmonic components, which can be used as the indicators of early crack and for multi-crack identification. This work has a promotive significance for the application of the model-based method in the field of multi-crack detection of actual rotors.</jats:p>

Item Type: Conference or Workshop Item (Unspecified)
Divisions: Faculty of Science and Engineering > School of Engineering
Depositing User: Symplectic Admin
Date Deposited: 08 Jun 2022 13:39
Last Modified: 22 Jun 2022 13:10
DOI: 10.1088/1742-6596/2184/1/012040
Open Access URL: https://iopscience.iop.org/article/10.1088/1742-65...
URI: https://livrepository.liverpool.ac.uk/id/eprint/3156064