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A Test-Case on Continuation Methods for Bladed-Disk Vibration with Contact and Friction

  • Z. SaeedEmail author
  • G. Jenovencio
  • S. Arul
  • J. Blahoš
  • A. Sudhakar
  • L. Pesaresi
  • J. Yuan
  • F. El Haddad
  • H. Hetzler
  • L. Salles
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Bladed-disks in turbo-machines experience harsh operating conditions and undergo high vibration amplitudes if not properly damped. Friction at the blade-to-blade or blade-to-disk interfaces plays a key role in dampening the high amplitudes. Due to the inherent complexity of these structures and non-linearities introduced by the friction joints, accurate response prediction becomes very difficult. There are variety of methods in the literature to predict non-linear vibration due to contact friction. However, their application to the bladed-disks remains limited. Furthermore, there are not many 3D realistic test-cases in the open literature for testing those methods and serve as a benchmark. A bladed-disk representative of a real turbine is presented as an open numerical test-case for the research community. It is characterized by a blade root joint and a shroud joint. The bladed-disk sector is meshed in different ways along with component mode synthesis (CMS) model order reduction for onward non-linear computations. The steady-state solution is obtained by multi-Harmonic Balance method and then continuation method is employed to predict the non-linear frequency response. Thus, it can serve as a case for testing previous and new methods as well as a benchmark for comparative studies.

Keywords

Bladed-disk Cyclic symmetry Nonlinear forced response MHBM Continuation method 

Notes

Acknowledgements

This work is a part of the project EXPERTISE that received funding from the European Union’s H2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No 721865. The authors are grateful to the ND-CSI Non-linear Dynamics of Coupled Structures and Interfaces Summer School 2018 organizers.

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Copyright information

© Society for Experimental Mechanics, Inc. 2020

Authors and Affiliations

  • Z. Saeed
    • 1
    Email author
  • G. Jenovencio
    • 2
  • S. Arul
    • 3
  • J. Blahoš
    • 4
  • A. Sudhakar
    • 3
  • L. Pesaresi
    • 4
  • J. Yuan
    • 4
  • F. El Haddad
    • 4
  • H. Hetzler
    • 5
  • L. Salles
    • 4
  1. 1.Politecnico di TorinoTurinItaly
  2. 2.Technical University of MunichGarchingGermany
  3. 3.IT4I National Supercomputing CenterOstravaCzech Republic
  4. 4.Imperial College LondonLondonUK
  5. 5.University of Kassel, FG Technische DynamikKasselGermany

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