Yang Chunlai, Yuan Yikai, Wang Hai, Tang Ye, Gui Jingsong
School of Mechanical Engineering, Anhui Polytechnic University, Wuhu 241000, China.
Anhui Key Laboratory of Advanced Numerical Control & Servo Technology, Wuhu 241000, China.
Micromachines (Basel). 2023 Feb 25;14(3):538. doi: 10.3390/mi14030538.
The wave energy focus effect of an acoustic black hole (ABH) is used for broadband vibration energy harvesting and boosts the harvested power. A vibration energy harvester based on two-dimensional ABH is proposed in this study, which consists of a rectangle plate with 2-D ABH and PZT film attached. The structure of ABH was designed and analyzed based on numerical simulation. The optimal parameters of the ABH were obtained, such as the power index, truncation thickness, cross-sectional length, and round table diameter, which were 3, 0.4 mm, 40 mm, and 24 mm, respectively. The quadratic velocity of the plate surface with ABH is up to 22.33 times that of a flat plate, and PZT film adheres to the corresponding positions of the ABH structure and plate structure, respectively. In the same condition, the average output power of a PZT with an ABH structure is higher than that of a flat plate under the same excitation-vibration condition.
声学黑洞（ABH）的波能聚焦效应被用于宽带振动能量收集，并提高了收集到的功率。本研究提出了一种基于二维ABH的振动能量收集器，它由带有二维ABH的矩形板和附着的PZT薄膜组成。基于数值模拟对ABH的结构进行了设计和分析。获得了ABH的最佳参数，如功率指数、截断厚度、横截面长度和圆桌直径，分别为3、0.4毫米、40毫米和24毫米。带有ABH的板表面的二次速度高达平板的22.33倍，PZT薄膜分别附着在ABH结构和板结构的相应位置。在相同条件下，在相同的激励振动条件下，带有ABH结构的PZT的平均输出功率高于平板。
