Global reduced-order model adapted to the low- and medium-frequency analysis of complex dynamical structures
Résumé
In structural dynamics, the use of the vibration eigenmodes (elastic modes) allows for obtaining an accurate small-dimension reduced-order model (ROM) for the low-frequency range analysis. For some complex structures with distinct structural levels (presence of flexible parts attached to a stiff master part), numerous local elastic modes are intertwined with the usual global elastic modes, yielding high-dimension ROM. To circumvent this difficulty, a general method is proposed in order to construct a small-dimension ROM whose reduction vector basis is constituted of the global displacements only. The method is applied to an automobile complex structure.
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conference-2015-PANACM-MECOM-Buenos-Aires-27-29-April-ezvan-batou-soize-preprint.pdf (501.41 Ko)
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