期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
卷 30, 期 18, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217979216501113
关键词
Tetragonal folding beam phononic crystal; bandgaps; low frequency noise control; vibration energy recovery
资金
- National Basic Research Program of China [2011CB610306]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1172]
- National Natural Science Foundation of China [51375362, 51205305]
This paper investigates ultralow frequency acoustic properties and energy recovery of ti tetragonal folding beam phononic crystal (TFBPC) and its complementary structure. The dispersion curve relationships, transmission spectra and displacement fields of the eigenmodes are studied with FEA in detail. Compared with the traditional three layer phononic crystal (PC) structure, this structure proposed in this paper not only unfold bandgaps (BGs) in lower frequency range (below 300 Hz), but also has lighter weight because of beam structural cracks. We analyze the relevant physical mechanism behind this phenomenon, and discuss the effects of the tetragonal folding beam geometric parameters on band structure maps. FEM proves that the multi-cell structures with different arrangements have different acoustic BGs when compared with single cell structure. Harmonic frequency response and piezoelectric properties of TFBPC are specifically analyzed. The results confirm that this structure does have the recovery ability for low frequency vibration energy in environment. These conclusions in this paper could be indispensable to PC practical applications such as BG tuning and could be applied in portable devices, wireless sensor, micro-electro mechanical systems which can recycle energy from vibration environment as its own energy supply.
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