Circumventing space sampling limitations in mechanical vibrations
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Abstract
The aim of this paper is to review the main techniques used to provide a significant solution to high frequency vibrations and/or structural-acoustic coupling. The characteristics of the different approaches are illustrated, focusing similarities and differences among them. A detailed description of the complex envelope displacement analysis is then presented, because of the promising developments of this approach. Finally some results are shown and discussed to emphasize the informative character of the different solutions.
Key words
Modelling Audio-frequency vibrations Envelope Hilbert transform VibrationsSommario
Scopo di questo articolo è quello di fornire un panorama critico delle tecniche che si sono o si stanno attualmente sviluppando per lo studio delle vibrazioni nel campo delle alte frequenze e per problemi di accoppiamento acustico-strutturale. Vengono, in particolare, messe in evidenza similitudini e differenze tra i vari metodi esaminati. Successivamente viene descritto in dettaglio un modello, chimato inviluppo complesso di spostamento, che appare molto promettente e ricco di sviluppi futuri. Vengono infine presentati alcuni risultati per evidenziare il diverso contenuto informativo delle soluzioni ottenute con le varie tecniche analizzate.
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