Transmission Properties of Two-Dimensional Chirped Phononic Crystal |
| S. Garus, W. Sochacki, M. Bold
Institute of Mechanics and Fundamentals of Machinery Design, Częstochowa University of Technology, J.H. Dąbrowskiego 73, 42-201 Częstochowa, Poland |
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| The mechanical wave transmission was investigated by a two-dimensional structure made of rods with a periodic arrangement - as the base structure. Compared structures had the same network constant in the direction perpendicular to the propagation of the acoustic wave, while the distances of subsequent layers of phononic crystal increased by a certain factor k. Depending on parameter k, chirped phononic crystal transmission properties were tested. The numerical analysis uses the finite difference time domain algorithm. The discrete Fourier transform allowed to determine the frequency characteristics of the tested systems. In order to verify numerical data, the experimental data was analyzed. |
DOI:10.12693/APhysPolA.135.153 PACS numbers: 43.60.Bf, 43.58.Kr, 43.20.Bi, 02.70.Bf |