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Communication Dans Un Congrès Année : 2016

A new dynamic substructuring method for nonlinear and dissipative systems

Résumé

This work is devoted to the development of a new dynamic substructuring method inspired by classic fixed-interface component mode synthesis, in order to compute the steady-state vibrations of dissipative, nonlinear structures. For each substructure, the displacement field is sought as a multiharmonic oscillation made of standard static mode shapes, supplemented by the eigenvectors of the nonlinear complex modes of the substructure computed with fixed-boundary conditions. The method eventually leads to a strongly reduced nonlinear algebraic system, easily solved by iterative solvers. The procedure is tested on a lumped parameter model of bladed disk subjected to dry friction nonlinearities, with or without structural mis-tuning, and proves very efficient in terms of computational cost. These results emphasize the promising capabilities of this new reduced-order modeling technique to tackle such nonlinear systems exhibiting high modal density.
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Dates et versions

hal-01389701 , version 1 (29-10-2016)

Identifiants

  • HAL Id : hal-01389701 , version 1

Citer

Colas Joannin, Benjamin Chouvion, Fabrice Thouverez. A new dynamic substructuring method for nonlinear and dissipative systems. ECCOMAS Congress 2016 - VII European Congress on Computational Methods in Applied Sciences and Engineering, Jun 2016, Hersonissos, Greece. ⟨hal-01389701⟩
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