Dumbbell-shaped piezoelectric energy harvesting from coupled vibrations

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2024-08-26 DOI:10.1016/j.ijmecsci.2024.109681

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Abstract

This paper presents a novel dumbbell-shaped piezoelectric energy harvesting from vortex-induced vibration (VIV) and galloping. The designed harvester system leverages the coupled vibrations to improve the output performance. The conceptual design of the dumbbell-shaped harvester system is first developed, the theoretical model of the harvester is then established, three-dimensional simulation analyses are conducted, and the prototypes of the harvester that combines a cylinder and a cuboid are finally manufactured. The effect of the cylinder lengths and airflow velocity on the harvesting characteristics is explored. The results demonstrate the derived mathematical model is fully verified through experimental method. VIV occurs in the 0.5D and 1D dumbbell-shaped harvester systems at lower airflow velocities, while galloping takes place at higher velocities, both of which contribute to increase the output performance. In contrast, the 1D - 3D dumbbell-shaped harvesters demonstrate a VIV behavior only and suppress vibration. The maximum voltage generated by the 0.5D harvester is 12.03 V at 4.29 m s^-1, which is 11.18 % higher than that of a single cuboid harvester. The vorticity fields illustrate the vortex shedding mode and intensity, as well as reveal the underlying influence mechanism.

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从耦合振动中获取哑铃形压电能量

本文介绍了一种新型哑铃形压电能量采集器，可从涡流诱导振动（VIV）和奔腾中采集能量。所设计的收割机系统利用耦合振动来提高输出性能。首先对哑铃形收割机系统进行了概念设计，然后建立了收割机的理论模型，进行了三维仿真分析，最后制造出了圆柱体和长方体相结合的收割机原型。探讨了圆筒长度和气流速度对收割特性的影响。结果表明，推导出的数学模型通过实验方法得到了充分验证。0.5D 和 1D 哑铃形收割机系统在气流速度较低时出现 VIV，而在气流速度较高时出现奔腾，这两种情况都有助于提高产量性能。相比之下，1D-3D 哑铃形收割机仅表现出 VIV 行为，并抑制振动。0.5D 收割机在 4.29 m s-1 时产生的最大电压为 12.03 V，比单立方体收割机高出 11.18 %。涡度场说明了涡流脱落的模式和强度，并揭示了潜在的影响机制。

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.