Frequency Response of Disordered Periodic Structures

by G. Q. Cai, Florida Atlantic Univ, Boca Raton, United States,
Y. K. Lin, Florida Atlantic Univ, Boca Raton, United States,



Document Type: Proceeding Paper

Part of: Engineering Mechanics

Abstract:

A computational procedure is given for calculating the frequency response of disordered periodic structures based on wave propagation theory. An ideal periodic structure is composed of identical cell-units which are connected end-to-end to form a spatially periodic array. However, due to material, geometric and manufacturing variabilities, a structure is designed to be periodic can never be exactly periodic. The departure from ideal periodicity is known as disorder, and it can cause wave attenuation even without damping. In this paper, another effect of disorder is investigated, namely, the variability of frequency response.

Subject Headings: Structural analysis | Wave propagation | Frequency response | Elastic analysis | Wave attenuation | Beams | Vector analysis

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