Dispersions du comportement de structures vibrantes : analyse et détection

Abstract : This work deals with sensitivity phenomenon on vibrating structures. An alternative to classical methods used in sensitivity analysis is presented : the proposed method is a tool that allows one to know which part of a structure is responsible for dispersions, in order to be able, during a design phase, to modify zones inducing large sensitivities, or in a manufacturing phase, to take care of these zones. The first step of this work is to present hypersensitive phenomenon, which can be observed on semi-infinite coupled beams and plates. The analysis and characterization of these phenomenon are developed and compared with finite cases. Then, a method to localize main uncertainty causes of a given structure is presented, it is based on techniques used in finite element updating, and it is applied on an analytical example, and developed in order to be integrated in a finite element code, in order to test it on industrial structures allowing experimental validation of
results.
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  • HAL Id : tel-00142547, version 1

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Morvan Ouisse. Dispersions du comportement de structures vibrantes : analyse et détection. Mécanique [physics.med-ph]. INSA de Lyon, 2002. Français. ⟨tel-00142547⟩

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