Determination of effective mass density and modulus for resonant metamaterials

Title
Determination of effective mass density and modulus for resonant metamaterials
Author
박준홍
Keywords
acoustic materials; acoustic variables measurement; acoustic wave propagation; acoustic wave transmission; effective mass; elastic moduli; metamaterials; oscillations; rods (structures); structural acoustics; transfer functions; vibration measurement; vibrations; viscoelasticity; ACOUSTIC METAMATERIALS
Issue Date
2012-10
Publisher
Acoustical Society of America
Citation
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, OCT 2012, 132(4), p2793-p2799, 7p.
Abstract
This work presents a method to determine the effective dynamic properties of resonant metamaterials. The longitudinal vibration of a rod with periodically attached oscillators was predicted using wave propagation analysis. The effective mass density and modulus were determined from the transfer function of vibration responses. Predictions of these effective properties compared favorably with laboratory measurements. While the effective mass density showed significant frequency dependent variation near the natural frequency of the oscillators, the elastic modulus was largely unchanged for the setup considered in this study. The effective mass density became complex-numbered when the spring element of the oscillator was viscoelastic. As the real part of the effective mass density became negative, the propagating wavenumber components disappeared, and vibration transmission through the metamaterial was prohibited. The proposed method provides a consistent approach for evaluating the effective parameters of resonant metamaterials using a small number of vibration measurements. (C) 2012 Acoustical Society of America. [http://dx.doi.org.access.hanyang.ac.kr/10.1121/1.4744940]
URI
https://asa.scitation.org/doi/10.1121/1.4744940http://repository.hanyang.ac.kr/handle/20.500.11754/70631
ISSN
0001-4966
DOI
10.1121/1.4744940
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE