Two–dimensional phononic crystals and scattering of elastic waves by an array of voids

Author(s):  
S. B. Platts ◽  
N. V. Movchan ◽  
R. C. McPhedran ◽  
A. B. Movchan
2019 ◽  
Author(s):  
Igor Popov ◽  
Irina Blinova ◽  
Anton Boitsev ◽  
Andre Froehly ◽  
Hagen Neidhardt

2010 ◽  
Vol 20 (1) ◽  
pp. 104-121 ◽  
Author(s):  
A-Li Chen ◽  
Yue-Sheng Wang ◽  
Jian-Bao Li ◽  
Chuanzeng Zhang

2017 ◽  
Vol 56 (3) ◽  
pp. 034101 ◽  
Author(s):  
Yukihiro Tanaka ◽  
Shunsuke Tomioka ◽  
Yukito Shimomura ◽  
Norihiko Nishiguchi

2019 ◽  
Vol 87 (1) ◽  
Author(s):  
Xiao-Dong Yang ◽  
Qing-Dian Cui ◽  
Wei Zhang

Abstract Phononic crystals composed of delicately designed periodic units are used to control spatial and spectral properties of acoustic or elastic waves. The ability to manipulate transmitting waves in a real-time dynamic manner provides a new concept in programable phononic crystals and metamaterials. In this study, the mechanical waves and bandgaps in a two-dimensional spring-mass array loaded by high-frequency parametric excitation have been investigated by both analytical and numerical methods. It is found that the high-frequency parametric excitation provides an equivalent additional stiffness which leads to low-frequency bandgaps. By tuning the parametric excitation, the versatility of such a dynamic modulating technique has been presented. The waveguide structure has also been designed and studied by non-uniformly distributed parametric excitations.


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