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International Journal for Uncertainty Quantification
Импакт фактор: 3.259 5-летний Импакт фактор: 2.547 SJR: 0.417 SNIP: 0.8 CiteScore™: 1.52

ISSN Печать: 2152-5080
ISSN Онлайн: 2152-5099

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International Journal for Uncertainty Quantification

DOI: 10.1615/Int.J.UncertaintyQuantification.2012005286
pages 475-485

UNCERTAINTY QUANTIFICATION IN LOW-FREQUENCY DYNAMICS OF COMPLEX BEAM-LIKE STRUCTURES HAVING A HIGH-MODAL DENSITY

Anas Batou
Université Paris-Est, Laboratoire Modlisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, 77454 Marne-la-Vallée, France
Christian Soize
Université Paris-Est Marne-La-Vallée Cité Descartes 5, bd Descartes, Champs sur Marne, 77454 Marne La Vallee Cedex 2, France

Краткое описание

The paper deals with the construction of a stochastic reduced-order model for beam-like dynamical structures having a high-modal density in the low-frequency range for which the classical methods used to construct a reduced-order model are not adapted. We then use a method recently proposed which consists of constructing a basis of the global displacements and a basis of the local displacements by solving two unusual eigenvalue problems. The stochastic reduced-order model is then constructed using the basis of the global displacements. The contribution of the local displacements is taken into account in the reduced-order model using a statistical approach. The theory is presented and is applied to a computational model of fuel assemblies for which the dynamical response must be characterized in terms of global displacements.

ЛИТЕРАТУРА

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  5. Soize, C., Reduced models in the medium frequency range for general dissipative structural-dynamics systems. DOI: 10.1016/S0997-7538(99)80027-8

  6. Soize, C., Probabilistic structural modeling in linear dynamic analysis of complex mechanical systems, I—Theoretical elements.

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  17. Batou, A. and Soize, C., Experimental identification of turbulent fluid forces applied to fuel assemblies using an uncertain model and fretting-wear estimation. DOI: 10.1016/j.ymssp.2009.03.018


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