000013209 001__ 13209
000013209 005__ 20161114160331.0
000013209 04107 $$aeng
000013209 046__ $$k2009-06-22
000013209 100__ $$aBatou, A.
000013209 24500 $$aExperimental identification of turbulent fluid forces applied to fuel assemblies using an uncertain model and estimation of the fretting-wear

000013209 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013209 260__ $$bNational Technical University of Athens, 2009
000013209 506__ $$arestricted
000013209 520__ $$2eng$$aThis paper is devoted to the identification of stochastic loads applied to fuel assemblies using an uncertain computational model and experimental measurements of responses. The stochastic loads applied to the structure are induced by a turbulent flow. The structure is made up of a nonlinear complex dynamical system. The experimental responses of the structure are obtained from strain sensors located on the structure. There are several sources of uncertainties in this experimental identification problem of the stochastic loads: uncertainties on the nonlinear dynamical computational model of the structure (fuel assemblies), uncertainties on parameters of the mathematical model of the stochastic loads themselves and finally, measurements errors. All these sources of uncertainties are identified and taken into account in the identification process of the stochastic loads. Then, the stochastic nonlinear dynamical computational model of fuel assemblies on which the identified stochastic loads are applied yield interesting results concerning the robustness of the estimation of the fretting-wear of the fuel rods.

000013209 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013209 653__ $$aNonlinear dynamics, uncertainties, identification, fretting-wear. Abstract. This paper is devoted to the identification of stochastic loads applied to fuel assemblies using an uncertain computational model and experimental measurements of responses. The stochastic loads applied to the structure are induced by a turbulent flow. The structure is made up of a nonlinear complex dynamical system. The experimental responses of the structure are obtained from strain sensors located on the structure. There are several sources of uncertainties in this experimental identification problem of the stochastic loads: uncertainties on the nonlinear dynamical computational model of the structure (fuel assemblies), uncertainties on parameters of the mathematical model of the stochastic loads themselves and finally, measurements errors. All these sources of uncertainties are identified and taken into account in the identification process of the stochastic loads. Then, the stochastic nonlinear dynamical computational model of fuel assemblies on which the identified stochastic loads are applied yield interesting results concerning the robustness of the estimation of the fretting-wear of the fuel rods.

000013209 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013209 720__ $$aBatou, A.$$iSoize, C.
000013209 8560_ $$ffischerc@itam.cas.cz
000013209 8564_ $$s140589$$uhttps://invenio.itam.cas.cz/record/13209/files/CD287.pdf$$yOriginal version of the author's contribution as presented on CD, section: Uncertainty and reliability in computational structural dynamics - i (MS).
000013209 962__ $$r13074
000013209 980__ $$aPAPER