Transmission Properties of Phononical Dodecagonal Filter |
| W. Sochacki
Department of Mechanics and Fundamentals of Machinery Design, Czestochowa University of Technology, Poland |
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| The study analyzed mechanical wave propagation in the aperiodic structure of the dodecagonal superlattice made of amorphous Zr55Cu30Ni5Al10 alloy. Methanol, n-Propanol and distilled water with additions of n-Propanol and ethanol were adopted as the second material forming the structure, after which their influence on the structure of wave transmission in the frequency range up to 40 kHz was determined. The analyzed multilayer was surrounded by glass. The change of liquid materials affected the transmission peak shifts. The Transfer Matrix Method (TMM) algorithm was used to investigate the effect of the material on the transmission structure, while using the Finite Difference Time Domain (FDTD) and Discrete Fourier Transform (DFT) algorithms, the power spectra and wave stabilization time after passing through the structure were determined. The study showed the existence of broad phononic bandgap for a dodecagonal structure with a small number of low transmission peaks. |
DOI:10.12693/APhysPolA.138.328 topics: finite difference time domain, aperiodic structure, multilayers, phononic, filters |