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|Type:||Artigo de evento|
|Title:||The Wave Spectral Finite Element Method Applied To The Design Of Periodic Waveguides|
|Abstract:||The design of periodic layered structures with desired wave dispersion characteristics is a subject of great potential use in vibration isolation. In this work, the modelling of a onedimensional periodic layered structure is performed using the wave spectral finite element method (WSFEM). Wave spectral finite elements are developed based on post processing a short segment of the waveguide modelled with conventional structural finite elements. The dynamic stiffness spectral element matrices are developed for the different layered materials and applied to model the forced response of a finite periodic layered rod. The periodic rod is assumed to consist of a sequence of unit cells, each cell consisting of two layers of different materials with contrasting properties. The frequency spectrum of the periodic rod is determined by the layered structure layout, so that the periodic rod structure can be designed to have the desired band gap by adjusting the thickness of each layer and total number of cells. A periodic layered rod made of polyacetal and stainless steel was built and tested in order to validate the modelling results. Finally, in order to investigate the divergences between the simulated response by WSFEM and the experimental one, additional simulations were performed using conventional finite element analysis (FEA). Copyright © (2011) by the International Institute of Acoustics & Vibration.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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