Journal article Open Access

Band structure analysis of leaky Bloch waves in 2D phononic crystal plates

Mazzotti, Matteo; Miniaci, Marco; Bartoli, Ivan


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    <dcat:keyword>phononic crystals, leaky Bloch waves, attenuation, band structure, finite element method, plane wave expansion method</dcat:keyword>
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    <dct:description>&lt;p&gt;A hybrid Finite Element-Plane Wave Expansion method is presented for the&lt;br&gt; band structure analysis of phononic crystal plates with two dimensional lattice&lt;br&gt; that are in contact with acoustic half-spaces. The method enables the computation&lt;br&gt; of both real (propagative) and imaginary (attenuation) components of&lt;br&gt; the Bloch wavenumber at any given frequency.&lt;br&gt; Three numerical applications are presented: a benchmark dispersion analysis&lt;br&gt; for an oil-loaded Titanium isotropic plate, the band structure analysis of a waterloaded&lt;br&gt; Tungsten slab with square cylindrical cavities and a phononic crystal&lt;br&gt; plate composed of Aurum cylinders embedded in an epoxy matrix.&lt;/p&gt;</dct:description>
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    <dct:title>Smart phononic crystals for aircraft noise reduction</dct:title>
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