Date:

2025-04-30

Title of Paper:

Band structures of two dimensional solid/air hierarchical phononic crystals

Journal:

Physica B

Summary:

The hierarchicalphononiccrystalstobeconsideredshowatwo-order‘‘hierarchical’’feature,which
consistsofsquarearrayarrangedmacroscopicperiodicunitcellswitheachunitcellitselfincludingfour
sub-units.Propagationofacousticwaveinsuchtwodimensionalsolid/airphononiccrystalsis
investigatedbythefiniteelementmethod(FEM)withtheBlochtheory.Theirbandstructure,wave
filteringproperty,andthephysicalmechanismresponsibleforthebroadenedbandgapareexplored.
The correspondingordinaryphononiccrystalwithouthierarchicalfeatureisusedforcomparison.
Obtainedresultsshowthatthesolid/airhierarchicalphononiccrystalspossesstunableoutstanding
band gapfeatures,whicharefavorableforapplicationssuchassoundinsulationandvibration
attenuation.

Co-author:

Y.L. Xu, X.G. Tian, C.Q. Chen

Volume:

407

Page Number:

1995–2001

Translation or Not:

No

Date of Publication:

2012-05-03