Application of 2-D acoustic black hole in piezoelectric vibration energy collection

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (7) : 10-17.

CHEN Bing, ZHANG Yangkun, REN Jiang, YIN Zhongjun

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Abstract

The Acoustic Black Hole (ABH) effect can generate strong energy concentration, which can convert low-quality vibration energy of high frequency and low amplitude into high-quality vibration energy of high amplitude, so as to facilitate utilization. A piezoelectric energy harvesting device for a circular two-dimensional acoustic black hole is proposed. The finite element analysis results show that the annular two-dimensional ABH structure can significantly improve the energy collection efficiency in the wide band domain. The experimental test platform of circular two-dimensional acoustic black hole piezoelectric energy collector is built, and the correctness of the simulation results is verified by experiments. Compared with the classical two-dimensional ABH structure, the annular two-dimensional ABH structure has better energy collection efficiency and structural strength. The influence of the geometric size of the piezoelectric plate on the energy collection efficiency of the device was analyzed, and the geometric size range of the higher output power was obtained. The orthogonal test design was carried out to study the comprehensive influence of the truncation thickness, the size of the piezoelectric plate, the diameter of the central platform, the power exponent, and other factors.

Key words

Flexural wave;Acoustic black hole;Energy harvesting / Electromechanical coupling

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CHEN Bing, ZHANG Yangkun, REN Jiang, YIN Zhongjun. Application of 2-D acoustic black hole in piezoelectric vibration energy collection[J]. Journal of Vibration and Shock, 2024, 43(7): 10-17

References

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