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Theses

Qualification de la prédiction du comportement vibratoire d'un sous-système sur véhicule

Abstract : The present doctoral thesis aims to predict vibratory forces transmitted at the interface between two mechanical structures. The study concerns structural dynamics in low frequency range and consists in modelling structural coupling in presence of uncertain parameters and experiments. Active automotive equipments are vibratory sources that cause vibrations on receiving structures (e.g a chassis) to which they are mounted. The control a priori of the vibratory field, and therefore acoustic field, of the assembled system supposes the prediction of vibratory forces at the interface. Practical situations show that the coupling strategy, used to predict forces acting on the receiver, leads to an inverse problem. In order to validate the predictions, they are compared with measurements. To comply with specifications regarding force magnitude, the interface between the two structures is optimized. It will be shown that in presence of the optimized interface, the dispersion of force magnitude is systematically lower than the dispersion in presence of the nominal interface.
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  • HAL Id : tel-00557906, version 1

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Saül Mapagha. Qualification de la prédiction du comportement vibratoire d'un sous-système sur véhicule. Mathématiques générales [math.GM]. INSA de Rouen; Université Pierre et Marie Curie, 2010. Français. ⟨NNT : 2010ISAM0011⟩. ⟨tel-00557906⟩

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