کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1863843 1037685 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Frequency modulation of waveguides in acoustic band-gap materials consisting of solid cylinders in viscous liquid
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Frequency modulation of waveguides in acoustic band-gap materials consisting of solid cylinders in viscous liquid
چکیده انگلیسی

We investigated waveguides in acoustic band-gap materials consisting of steel cylinders in a liquid with viscous damping. Numerical results show that when the viscous penetration depth is comparable to the structural length scale, linear defect states fall in complete acoustic band gaps forming waveguides. It is also found that the magnitude of the viscosity in the liquid has an influence on the frequency of waveguides, that large viscous damping can make the defect modes ascend. An expected frequency of waveguides can be obtained by modulating the viscous damping parameter θ.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 374, Issue 9, 15 February 2010, Pages 1192–1196
نویسندگان
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