This paper proposes a novel design for a flow-induced vibration-based energy harvester, consisting of an elastic L-shaped beam, with an inherent nonlinearity in its structural stiffness as an alternative to the classical cantilever beam used in conventional fluidic energy harvester designs. The L-shaped beam supports a prism at its tip and undergoes large-amplitude galloping oscillations. The results from wind tunnel experiments show that by replacing a conventional linear structure that supports the prism with a nonlinear one, the high frequency flow components, shed from the tip prism, were capable of exciting the oscillations of the structure at higher harmonics of the main resonance, thus enhancing the power density of the energy harvester. As a result of improved power density values, the proposed harvester design holds great potential to be used as advanced space-efficient energy harvesters.

中文翻译：

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固有非线性结构的流动诱导振动在能量收集中的应用

本文提出了一种基于流动诱导振动的能量收集器的新颖设计，该设计由弹性 L 形梁组成，其结构刚度具有固有的非线性，作为传统流体能量收集器设计中使用的经典悬臂梁的替代方案。L形梁在其尖端支撑一个棱镜并经历大振幅的奔腾振荡。风洞实验的结果表明，通过用非线性结构代替传统的支撑棱镜的线性结构，从尖端棱镜脱落的高频流动分量能够激发结构在主要高次谐波下的振荡。共振，从而提高能量收集器的功率密度。由于功率密度值的提高，