0929 Nonlinear computational structural dynamics in rotating turbomachinery

  • Evangéline Capiez-lernout, Université Gustave Eiffel
  • Christian Soize, Université Gustave Eiffel
  • Christophe Desceliers, Université Gustave Eiffel
  • Marc Mignolet, Arizona State University

Key-words : Nonlinearities, Model reduction, Turbomachinery, Structural dynamics, Detuning, Mistuning

The nonlinear dynamics of rotating structures in turbomachinery yield complex behaviors that require to be finely understood, requiring advanced computational modeling combined to a thorough analysis of the responses. Nonlinearities are physical phenomena that can be issued either from large amplitude displacements or contact nonlinearities occurring at the interface between the rotor and the stator. Intentional detuning strategies can also be investigated in order to control and to reduce the amplifications induced by the mistuning phenomenon.
The present Mini-Symposium focuses on around all the recent computational developments linked to this industrial field. In particular, the industrial context requires methodological developments based on the use of reduced-order models than have to be able to capture these phenomena. Contributions in the following aspects are fully welcomed:
· Model reduction adapted to the modeling of geometrical non-linearities
· Model reduction adapted to the modeling of contact non-linearities (blade/disk; rotor/stator)
· Developments of numerical methods for solving the non-linear equations 
· Optimization strategies for controlling the energy transfers, the amplitudes of the resonances 
· Uncertainty quantification aspects of the nonlinear responses

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