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A localized meshless collocation method for bandgap calculation of anti-plane waves in 2D solid phononic crystals. (English) Zbl 1464.74363

Summary: In this paper, a localized meshless collocation method, the generalized finite difference method (GFDM), is first applied to calculate the bandgaps of anti-plane transverse elastic waves in 2D solid phononic crystals with square and triangular lattice. The corresponding theoretical consistency analysis of the GFDM is given. The universal algorithm for the uniform/scattered node generation in the GFDM is presented. In comparison with the traditional plane wave expansion (PWE) method and Pressure Acoustics Module in COMSOL software, the proposed GFDM can provide the similar accurate results with less computational times for calculating the band structures of the simple/complicated shape scatterers in the square/triangular lattice. Three influence factors (Filling fractions (Ff), rotation angles (Ra) and arm widths (Aw) in the unit-cell) of the bandgap properties in 2D phononic crystals are numerically discussed.

MSC:

74S20 Finite difference methods applied to problems in solid mechanics
65N06 Finite difference methods for boundary value problems involving PDEs

Software:

COMSOL
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Full Text: DOI

References:

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