Evaluation of the effective speed of sound in phononic crystals by the monodromy matrix method (L).
A scheme for evaluating the effective quasistatic speed of sound c in two- and three-dimensional periodic materials is reported. The approach uses a monodromy-matrix operator to enable direct integration in one of the coordinates and exponentially fast convergence in others. As a result, the solution for c has a more closed form than previous formulas. It significantly improves the efficiency and accuracy of evaluating c for high-contrast composites as demonstrated by a two-dimensional scalar-wave example with extreme behavior.
Université de Bordeaux, Institut de Mécanique et d'Ingénierie de Bordeaux, UMR 5295, Talence 33405, France.
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Kutsenko
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Shuvalov
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Norris