期刊
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
卷 217, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jweia.2021.104733
关键词
Energy harvester; Piezoelectricity; Bistable; Snap-through; Wind speed
资金
- National Science Fund for Distinguished Young Scholars [51925802]
- National Natural Science Foundation of China [11972123]
- Guangdong Basic and Applied Basic Research Foundation [2019A1515111117]
- 111 Project [D21021]
The paper introduces a novel bistable piezoelectric energy harvester that utilizes VIV to trigger switching between stable states, resulting in significant energy output.
As a key form of wind-induced energy acquisition, vortex-induced vibration (VIV) can only produce a large amplitude when resonance response occurs, which limits its application. This paper describes a novel bistable piezoelectric energy harvester prone to snap-through events that absorbing wind energy from the environment. VIV is used to trigger the switching of this bistable structure between different stable states. At this time, a large energy output can be generated due to the large deflection and local high-frequency vibration accompanied by this process. The characteristics of the proposed harvester are experimentally tested in the wind speed range of 2.5-8.5 m/s, and a maximum output voltage of 13.68 V is obtained at the wind speed of 8.5 m/s. With the increase of the external resistance value from 47 to 1 M omega, the maximum output power of 4.216 mW is obtained at the resistance value of 47 k omega and wind speed of 8.5 m/s.
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