ON THE STRUCTURAL CHARACTERIZATION THROUGH K-SPACE METHODS: ASSESSMENTS AND VALIDATIONS
Résumé
The physical characteristics of periodic structures are employed to analyze the vibro-acoustic response of several complex structures in the wavenumber domain. This work is fo-cused on the analysis of elastic periodic structures, designed in order to obtain a wave atten-uation in certain frequency bands, generating the so-called band-gaps (mainly related to the Bragg's effect), and on the identification of the material properties of complex structures. In this context, an inverse wavenumber correlation method is developed to obtain the dispersion characteristics and the damping information of complex periodic structures. The wavenumbers and the damping loss factor are identified exciting the structure by a unit harmonic force and using the complete vibrational field as primary input.
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