Journal
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
Volume 32, Issue 2, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217979218500054
Keywords
Bandgaps; infrasound protection; phononic crystals; self-similarity hollow inclusions
Funding
- National Natural Science Foundation of China [11704314, 11474230]
- Fundamental Research Funds for the Central Universities [3102016QD056]
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FEA method is applied in order to investigate the bandgaps of two-dimensional (2D) phononic crystals which are composed with self-similarity hollow inclusions. Transmission spectra together with dispersion relations and displacement fields have been studied with FEA in detail. The simultaneous mechanisms of Bragg scattering enable multiterm bandgaps to be unfolded by the structure that can be effectively shifted by changing the lattice constant, matrix density and degree of self similarity. The smallest bandgap is located in the infrasonic wave range. Our results verify these phononic crystals with self-similar hollow inclusion structure which can change the number, location and width of bandgaps.
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