scholarly journals Antiplane elastic wave propagation in pre-stressed periodic structures; tuning, band gap switching and invariance

Wave Motion ◽  
2016 ◽  
Vol 63 ◽  
pp. 98-110 ◽  
Author(s):  
Ellis G. Barnwell ◽  
William J. Parnell ◽  
I. David Abrahams
Keyword(s):  
Wave Propagation ◽  
Elastic Wave ◽  
Band Gap ◽  
Periodic Structures ◽  
Elastic Wave Propagation

Elastic wave propagation characteristics of periodic track structure in high-speed railway

2018 ◽  
Vol 25 (3) ◽  
pp. 517-528 ◽  
Author(s):  
Ping Wang ◽  
Qiang Yi ◽  
Caiyou Zhao ◽  
Mengting Xing
Keyword(s):  
Wave Propagation ◽  
Elastic Wave ◽  
Band Gap ◽  
High Speed ◽  
Elastic Wave Propagation ◽  
Flexural Wave ◽  
Track Structure ◽  
Propagation Characteristics ◽  
In Situ Experiment ◽  
Random Disorder

Wave propagation in the ordered and randomly disordered periodic track structure in high-speed railways are investigated theoretically and experimentally. Taking the CRTS-I double-block ballastless track structure in China as the research object, a theoretical model of periodic track structure is established. The rail is modelled as a Timoshenko beam considering the bending–torsional coupling. The dispersion curves of the periodic track structure are obtained according to the transfer matrix method and Bloch theory. Based on the Lyapunov exponent algorithm, the elastic wave propagation characteristics of the randomly disordered periodic track structure are further calculated and analyzed considering the random disorder of structure parameters. The obtained results show that the periodic track structure is characterized by band gaps, elastic wave propagation attenuates significantly within the band gap, and random disorder in the track structure can expand the attenuation regions. Finally, the band gap characteristics of the vertical/lateral flexural wave and torsional wave are verified respectively through an in situ experiment.

scholarly journals Active tuning of elastic wave propagation in a piezoelectric metamaterial beam

AIP Advances ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 065009
Author(s):  
Xi-Ning Zhao ◽  
Xiao-Dong Yang ◽  
Wei Zhang ◽  
Huayan Pu
Keyword(s):  
Wave Propagation ◽  
Elastic Wave ◽  
Elastic Wave Propagation

Elastic wave propagation in hierarchical lattices with convex and concave hexagons stacked vertexes

2019 ◽  
Vol 146 (3) ◽  
pp. 1519-1527 ◽  
Author(s):  
ZhiWei Zhu ◽  
ZiChen Deng ◽  
ShuZhan Tong ◽  
BenJie Ding ◽  
JianKe Du
Keyword(s):  
Wave Propagation ◽  
Elastic Wave ◽  
Elastic Wave Propagation ◽  
Hierarchical Lattices
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