A Modal Coupling for Fluid and Structure Analyses of Turbomachine Flutter: Application to a Fan Stage PUBLIC ACCESS

[+] Author Affiliations
Francois Moyroud

Royal Institute of Technology, Stockholm, SwedenInstitut National des Sciences Appliquées, Villeurbanne, France

Georges Jacquet-Richardet

Institut National des Sciences Appliquées, Villeurbanne, France

Torsten Fransson

Royal Institute of Technology, Stockholm, Sweden

Paper No. 96-GT-335, pp. V005T14A032; 13 pages
  • ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General
  • Birmingham, UK, June 10–13, 1996
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7876-7
  • Copyright © 1996 by ASME


The paper presents an approach for the modal aeroelastic analysis of three-dimensional turbomachinery bladings with several fluid and structure analyzers. Structure analyzers are three-dimensional solvers for static and dynamic analyses of axisymmetric/cyclic-symmetric blade-shroud-disk-shaft assemblies with/without elastic coupling between blades. Fluid analyzers are two-dimensional/three-dimensional solvers for single/multi-stage steady/unsteady turbomachinery flows. An automatic interfacing procedure for exchanging data at the incompatible fluid-structure boundary and the development of a multi-model interfacing software are discussed. The modal aeroelastic analysis of a first stage shrouded fan is carried out to illustrate the main issues of the paper. In particular, two structural models for the elastic coupling of the part-span shrouds are discussed. The results show the strong dependence of the structure dynamics and aeroelastic analysis on this modelling.

Copyright © 1996 by ASME
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