Numerical investigation of cracked rotor

The aim of this paper is investigating the cracked Jeffcott with an offset disk rotor system. The finite element method (FEM) used in ANSYS gives an attractive approach for modeling the rotor dynamic system. The effect of changing speeds has been analyzed on the dynamic parameters of journal bearing...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-01, Vol.709 (4), p.44073
Main Authors: Abed, Salam Ahmed, Bahrami, Mohammad Reza, Thijel, Jassim Farij
Format: Article
Language:English
Subjects:
Bending stresses
Damping
Dynamic loads
Finite element method
Journal bearings
Military helicopters
Rotors
Stiffness
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Summary:The aim of this paper is investigating the cracked Jeffcott with an offset disk rotor system. The finite element method (FEM) used in ANSYS gives an attractive approach for modeling the rotor dynamic system. The effect of changing speeds has been analyzed on the dynamic parameters of journal bearings (stiffness and damping) and then on Sommerfeld number. The relation of the dynamic bending stress with the static stress of rotor with cracks (dynamic load factor (DLF)) and with the ratio of depth crack to radius rotor has been established. The results have been obtained numerically by using ANSYS. The results show when crack's depths increase the DLF increases and reach to maximum when a/R = 0.8.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/709/4/044073