Elastic wave and vibration bandgaps in two-dimensional acoustic metamaterials with resonators and disorders

Wave Motion ◽  
2018 ◽  
Vol 80 ◽  
pp. 69-81 ◽  
Author(s):  
Xiyue An ◽  
Hualin Fan ◽  
Chuanzeng Zhang
Keyword(s):  
Elastic Wave ◽  
Two Dimensional ◽  
Acoustic Metamaterials

A CALIBRATED MODEL SEISMIC SYSTEM

Geophysics ◽  
1972 ◽  
Vol 37 (3) ◽  
pp. 445-455 ◽  
Author(s):  
C. N. G. Dampney ◽  
B. B. Mohanty ◽  
G. F. West
Keyword(s):  
Wave Propagation ◽  
Elastic Wave ◽  
Elastic Waves ◽  
Critical Examination ◽  
Two Dimensional ◽  
Linear Filtering ◽  
Analog Model ◽  
Basic Assumptions ◽  
Electronic Circuitry ◽  
Seismic System

Simple electronic circuitry and axially polarized ceramic transducers are employed to generate and detect elastic waves in a two‐dimensional analog model. The absence of reverberation and the basic simplicity. of construction underlie the advantages of this system. If the form of the fundamental wavelet in the model itself, as modified by the linear filtering effects of the remainder of the system, can be found, then calibration is achieved. This permits direct comparison of theoretical and experimental seismograms for a given model if its impulse response is known. A technique is developed for calibration and verified by comparing Lamb’s theoretical and experimental seismograms for elastic wave propagation over the edge of a half plate. This comparison also allows a critical examination of the basic assumptions inherent in a model seismic system.

Development of an efficient algorithm to analyze the elastic wave in acoustic metamaterials

2016 ◽  
Vol 227 (10) ◽  
pp. 3015-3030 ◽  
Author(s):  
Z. C. He ◽  
Eric Li ◽  
G. Wang ◽  
G. Y. Li ◽  
Zhaowang Xia
Keyword(s):  
Elastic Wave ◽  
Efficient Algorithm ◽  
Acoustic Metamaterials

Quasi-two-dimensional acoustic metamaterials

2014 ◽  
Author(s):  
D. Torrent ◽  
R. Graciá-Salgado ◽  
V. M. García-Chocano ◽  
F. Cervera ◽  
J. Sánchez-Dehesa
Keyword(s):  
Two Dimensional ◽  
Acoustic Metamaterials

Hybrid modeling of elastic‐wave propagation in two‐dimensional laterally inhomogeneous media

Geophysics ◽  
1987 ◽  
Vol 52 (6) ◽  
pp. 765-771 ◽  
Author(s):  
B. Kummer ◽  
A. Behle ◽  
F. Dorau
Keyword(s):  
Integral Equation ◽  
Wave Propagation ◽  
Finite Difference ◽  
Elastic Wave ◽  
Boundary Integral Equation ◽  
Integral Equation Method ◽  
Boundary Integral ◽  
Two Dimensional ◽  
Hybrid Scheme ◽  
Finite Difference Techniques

We have constructed a hybrid scheme for elastic‐wave propagation in two‐dimensional laterally inhomogeneous media. The algorithm is based on a combination of finite‐difference techniques and the boundary integral equation method. It involves a dedicated application of each of the two methods to specific domains of the model structure; finite‐difference techniques are applied to calculate a set of boundary values (wave field and stress field) in the vicinity of the heterogeneous domain. The continuation of the near‐field response is then calculated by means of the boundary integral equation method. In a numerical example, the hybrid method has been applied to calculate a plane‐wave response for an elastic lens embedded in a homogeneous environment. The example shows that the hybrid scheme enables more efficient modeling, with the same accuracy, than with pure finite‐difference calculations.

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