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Experimental Method to Evaluate Effective Dynamic Properties of a Meta-Structure for Flexural Vibrations

Title
Experimental Method to Evaluate Effective Dynamic Properties of a Meta-Structure for Flexural Vibrations
Author
박준홍
Keywords
Metamaterials; Wave propagation; Effective material properties; Flexural vibration
Issue Date
2017-04
Publisher
SPRINGER
Citation
EXPERIMENTAL MECHANICS, v. 57, no. 3, page. 417-425
Abstract
In this study, a laboratory method to evaluate the effective dynamic properties for flexural vibrations of a meta-structure is presented. The flexural vibration of a beam with periodically spaced resonators was investigated using wave propagation analysis. After analyzing vibration interactions between the resonators and the homogeneous beam, the effective dynamic properties of the meta-structure were evaluated using the transfer function method. The comparison of the measured and predicted results allowed for an understanding of the proposed vibration control mechanism. The effective bending stiffness was not affected by the attached resonators. The effective mass exhibited significant frequency-dependent variation near the natural frequency of the resonators. The effective mass becomes complex when the stiffness of the resonators is viscoelastic. The reflected wave from the metamaterial was completely blocked when the real part of the effective mass became negative. The effective mass decreased as the loss factor of the attached resonators increased. The proposed evaluation method can be used to analyze the effects of resonators on structural vibrations.
URI
https://link.springer.com/article/10.1007%2Fs11340-016-0242-2http://repository.hanyang.ac.kr/handle/20.500.11754/113628
ISSN
0014-4851; 1741-2765
DOI
10.1007/s11340-016-0242-2
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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