Effects of unsteady aerodynamics on the dynamic response of mistuned bladed disks

Zhijiang He, Bogdan I. Epureanu, Christophe Pierre

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations

Abstract

This paper presents the preliminary results of studies on the dynamics of mistuned bladed disks including both structural and aerodynamic coupling. Aerodynamic coefficients calculated from a quasi-3D unsteady aerodynamic code are incorporated into a high-fidelity structural model employing the component mode mistuning (CMM) method. The extended CMM model is applied to the analysis of the dynamics of an industrial compressor stage. The eigenvalue structures of the tuned and mistuned systems including aerodynamic coupling are compared for the cases without structural damping, with small structural damping and with large structural damping. Also, the effect of aerodynamic coupling on the forced response of the system is investigated. For the cases studied, the large structural damping can change the eigenvalue structure of the mistuned system. Under certain conditions, the aerodynamic coupling is shown to decrease the mistuned forced response amplification factor compared to the tuned forced response.

Original languageEnglish
Title of host publication3rd M.I.T. Conference on Computational Fluid and Solid Mechanics
Pages250-255
Number of pages6
StatePublished - 2005
Event3rd M.I.T. Conference on Computational Fluid and Solid Mechanics - Boston, MA, United States
Duration: 14 Jun 200517 Jun 2005

Publication series

Name3rd M.I.T. Conference on Computational Fluid and Solid Mechanics

Conference

Conference3rd M.I.T. Conference on Computational Fluid and Solid Mechanics
Country/TerritoryUnited States
CityBoston, MA
Period14/06/0517/06/05

Keywords

  • Aerodynamic coupling
  • CMM model
  • Eigenvalue structure
  • Forced response
  • Mistuning
  • Structural coupling

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