P4I-3 A Magnified Lamb Wave Source Based on the Resonant Cavity of Phononic-Crystal Plates

2007 ◽  
Author(s):  
J.-H. Sun ◽  
T.-T. Wu
Keyword(s):  
Lamb Wave ◽  
Phononic Crystal ◽  
Resonant Cavity ◽  
Wave Source

Highly directional acoustic wave radiation based on asymmetrical two-dimensional phononic crystal resonant cavity

2006 ◽  
Vol 88 (26) ◽  
pp. 263505 ◽  
Author(s):  
Manzhu Ke ◽  
Zhengyou Liu ◽  
Pei Pang ◽  
Wengang Wang ◽  
Zhigang Cheng ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Phononic Crystal ◽  
Resonant Cavity ◽  
Wave Radiation ◽  
Two Dimensional

Lamb wave band gaps in locally resonant phononic crystal strip waveguides

2012 ◽  
Vol 376 (4) ◽  
pp. 579-583 ◽  
Author(s):  
Yuanwei Yao ◽  
Fugen Wu ◽  
Xin Zhang ◽  
Zhilin Hou
Keyword(s):  
Lamb Wave ◽  
Phononic Crystal ◽  
Band Gaps ◽  
Wave Band

Highly directional liquid surface wave source based on resonant cavity

2009 ◽  
Vol 373 (33) ◽  
pp. 2948-2952 ◽  
Author(s):  
Jun Mei ◽  
Chunyin Qiu ◽  
Jing Shi ◽  
Zhengyou Liu
Keyword(s):  
Surface Wave ◽  
Liquid Surface ◽  
Resonant Cavity ◽  
Wave Source

Lamb wave band gaps in one-dimensional radial phononic crystal slabs

2015 ◽  
Vol 29 (03) ◽  
pp. 1550002 ◽  
Author(s):  
Yinggang Li ◽  
Tianning Chen ◽  
Xiaopeng Wang
Keyword(s):  
Finite Element ◽  
Axial Symmetry ◽  
Lamb Wave ◽  
Lamb Waves ◽  
Phononic Crystal ◽  
Band Gaps ◽  
Slab Thickness ◽  
Wave Band ◽  
Filling Fraction ◽  
One Dimensional

In this paper, we theoretically investigate the band structures of Lamb wave in one-dimensional radial phononic crystal (PC) slabs composed of a series of alternating strips of epoxy and aluminum. The dispersion relations, the power transmission spectra and the displacement fields of the eigenmodes are calculated by using the finite element method based on two-dimensional axial symmetry models in cylindrical coordinates. The axial symmetry model is validated by three-dimensional finite element model in Cartesian coordinates. Numerical results show that the proposed radial PC slabs can yield several complete band gaps with a variable bandwidth exist for elastic waves. Furthermore, the effects of the filling fraction and the slab thickness on the band gaps are further explored numerically. It is worth observing that, with the increase of the filling fraction, both the lower and upper edges of the band gaps are simultaneously shifted to higher frequency, which results from the enhancement interaction between the rigid resonance of the scatterer and the matrix. The slab thickness is the key parameter for the existence and the width of complete band gaps in the radial PC slabs. These properties of Lamb waves in the radial PC plates can potentially be applied to optimize band gaps, generate filters and design acoustic devices in the rotary machines and structures.

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