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Proceedings Paper

Directional and band-gap behavior of periodic grid-like structures
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Paper Abstract

This paper investigates the wave propagation characteristics of two-dimensional periodic lattice structures. Periodic structures in general feature unique wave propagation characteristics, whereby waves are allowed to propagate only in specific frequency bands. Two-dimensional periodic structures complement this feature with a low frequency directional behavior. The combination of these unique characteristics makes two-dimensional periodic structures ideal candidates for the design of pass-band directional mechanical filters. A rectangular lattice configuration is here considered. The wave attenuation properties of the lattice are demonstrated and their sensitivity with respect to geometry changes is explored. An optimization problem is formulated by considering a set of geometric features as design variables, and where the width of the attenuation zones and angular range of propagation at low frequencies are the objective functions. The identified optimal configuration show the combined properties of the considered assembly and the effectiveness of the analysis procedure. The experimental validation of the presented results represents a natural development of the current effort.

Paper Details

Date Published: 29 July 2004
PDF: 11 pages
Proc. SPIE 5386, Smart Structures and Materials 2004: Damping and Isolation, (29 July 2004); doi: 10.1117/12.540352
Show Author Affiliations
Sang Min Jeong, Georgia Institute of Technology (United States)
Massimo Ruzzene, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 5386:
Smart Structures and Materials 2004: Damping and Isolation
Kon-Well Wang, Editor(s)

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