Circumventing space sampling limitations in mechanical vibrations

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.