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A Continuous Model for the Dynamical Analysis of Mistuned Bladed Rotors
Joint Authors
Caruso, Giovanni
Bisegna, Paolo
Source
International Journal of Rotating Machinery
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-04-24
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Ideal bladed rotors are rotationally symmetric, as a consequence they exhibit couples of degenerate eigenmodes at coinciding frequencies.
When even small imperfections are present destroying the periodicity of the structure (disorder or mistuning), each couple of degenerate eigenfrequencies splits into two distinct values (frequency split) and the corresponding modal shapes exhibit vibration amplitude peaks concentrated around few blades (localization phenomenon).
In this paper a continuous model describing the in-plane vibrations of a mistuned bladed rotor is derived via the homogenization theory.
Imperfections are accounted for as deviations of the mass and/or stiffness of some blades from the design value; a perturbation approach is adopted in order to investigate the frequency split and localization phenomena arising in the imperfect structure.
Numerical simulations show the effectiveness of the proposed model, requiring much lower computational effort than classical finite element schemes.
American Psychological Association (APA)
Bisegna, Paolo& Caruso, Giovanni. 2012. A Continuous Model for the Dynamical Analysis of Mistuned Bladed Rotors. International Journal of Rotating Machinery،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-467330
Modern Language Association (MLA)
Bisegna, Paolo& Caruso, Giovanni. A Continuous Model for the Dynamical Analysis of Mistuned Bladed Rotors. International Journal of Rotating Machinery No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-467330
American Medical Association (AMA)
Bisegna, Paolo& Caruso, Giovanni. A Continuous Model for the Dynamical Analysis of Mistuned Bladed Rotors. International Journal of Rotating Machinery. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-467330
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-467330