期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 162, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2021.108047
关键词
Topological cavity; Phononic thin plate; Energy harvesting; Robustness; Piezoelectricity
资金
- National Natural Science Foundation of China [11902223]
- Shanghai Pujiang Program [19PJ1410100]
- program for professor of special appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- Shanghai municipal peak discipline program [2019010106]
- HighLevel Foreign Expert Program of Tongji University
- Fundamental Research Funds for the Central Universities
The study proposes using phononic thin plate systems for robust energy harvesting application relying on zero-dimensional cavities confined by the Kekule's distorted topological vortices. The harvesting power induced by topological cavities is about 30 times that of the bare plate. Further studies show that the proposed energy harvesting system is highly robust against symmetry-preserving defects and is less influenced even for symmetry-breaking defects at moderate perturbation level.
Piezoelectric energy harvesting has attracted tremendous interest for designing sustainable selfpowered devices/systems targeted to special environment such as wireless or wearable applications. The traditional cavity (e.g., phononic cavity mode) excitation is highly applicable in terms of sufficient power generation, nevertheless, has to endure the drawback of extremely poor robustness intrinsic to the trivial cavity modes. We propose to use phononic thin plate systems for robust energy harvesting application relying on zero-dimensional cavities confined by the Kekule & acute; distorted topological vortices. The harvesting power induced by topological cavities is about 30 times that of the bare plate. Further studies on the effects of deliberately introduced defects on the output power show that the proposed energy harvesting system is highly robust against symmetry-preserving defects, and is less influenced even for symmetry-breaking defects at moderate perturbation level. Beyond the reported energy harvesting application, we foresee that our work may open avenues for robust operations in the realm of wireless sensing and structural health monitoring.
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