کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5485297 | 1523195 | 2017 | 4 صفحه PDF | دانلود رایگان |
- A hybrid finite element-plane wave expansion method is proposed.
- Phononic crystal plates in contact with acoustic half-spaces are considered.
- Complex Bloch wavenumbers are obtained from a nonlinear eigenvalue problem.
- Attenuation band diagrams are shown for 1D and 2D phononic crystal plates.
A hybrid Finite Element-Plane Wave Expansion method is presented for the band structure analysis of phononic crystal plates with two dimensional lattice that are in contact with acoustic half-spaces. The method enables the computation of both real (propagative) and imaginary (attenuation) components of the Bloch wavenumber at any given frequency.Three numerical applications are presented: a benchmark dispersion analysis for an oil-loaded Titanium isotropic plate, the band structure analysis of a water-loaded Tungsten slab with square cylindrical cavities and a phononic crystal plate composed of Aurum cylinders embedded in an epoxy matrix.
Journal: Ultrasonics - Volume 74, February 2017, Pages 140-143