To enhance energy harvesting efficiency at low wind speeds, this study introduces a novel galloping piezoelectric energy harvester incorporating two V-shaped attachments inspired by a swallowtail. These attachments are affixed to each side of a square bluff body and are designed to optimize aerodynamic forces, thereby initiating and sustaining galloping phenomena at lower wind speeds. Additionally, the device incorporates an adjustable nonlinear monostable characteristic through magnet placement. This adjustment induces a softening effect, allowing for larger vibration amplitudes even under minimal wind conditions. Through potential energy and restoring force analyses, the study assesses the performance benefits of this monostable characteristic in enhancing energy harvesting. Wind tunnel experiments verify that the harvester outperforms its linear counterparts at lower wind speeds by achieving greater vibration amplitudes and higher voltage outputs. The proposed design promises to broaden the applicability of piezoelectric harvesters in low-wind environments, potentially enhancing their utility in sustainable energy solutions.

中文翻译：

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通过驰骋压电采集器中的两个 V 形附件和单稳态特性增强风能采集


为了提高低风速下的能量收集效率，本研究引入了一种新型驰骋压电能量收集器，该能量收集器包含两个受燕尾启发的 V 形附件。这些附件固定在方形钝体的每一侧，旨在优化空气动力，从而在较低风速下启动和维持驰骋现象。此外，该器件还通过磁铁放置实现了可调节的非线性单稳态特性。这种调整会产生软化效果，即使在最小风力条件下也能实现更大的振动幅度。通过势能和恢复力分析，该研究评估了这种单稳态特性在增强能量收集方面的性能优势。风洞实验验证了该采集器在较低风速下通过实现更大的振动幅度和更高的电压输出而优于其线性同类采集器。拟议的设计有望扩大压电采集器在低风环境中的适用性，从而有可能增强其在可持续能源解决方案中的效用。