کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5485297 1523195 2017 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Short communicationBand structure analysis of leaky Bloch waves in 2D phononic crystal plates
ترجمه فارسی عنوان
تجزیه و تحلیل ساختار نوری از امواج نشتی بلوخ در صفحات کریستال فونون دو بعدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم آکوستیک و فرا صوت
چکیده انگلیسی


- 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics - Volume 74, February 2017, Pages 140-143
نویسندگان
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