Quels capteurs de vibrations pour la surveillance de santé des structures mécaniques ?

Abstract : The aim of the thesis is to define principles and approaches of a practical implementation of vibration sensors for dynamic monitoring of structures, specially damage detection. The general idea is to study the combinations instrumentation /detection method. Thus, a numerical sensitivity study of different damage detection and localization methods using modal parameters (mainly natural frequencies and mode shapes) was performed according to the type of sensor used, to the number of sensors, to the severity of the damage, and to dispersion of modal parameters. The case-study is conducted on an aluminium clamped-clamped beam. A panorama of the capacity of each method for dynamic assessment of structures has been presented. Overall, long base strain gauges provide better results for damage detection methods. A method developed in the Dynamic group applied to numerical and experimental data, is able to locate mass and/or flexural rigidity modifications and to quantify these perturbations
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Désirée Najm. Quels capteurs de vibrations pour la surveillance de santé des structures mécaniques ?. Mécanique des matériaux [physics.class-ph]. Université Paris-Est, 2015. Français. ⟨NNT : 2015PEST1072⟩. ⟨tel-01186376⟩

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