首页|Flow-induced oscillation dynamics of a U-shaped buckled membrane: a comparison with the leading-edge-clamped membrane
Flow-induced oscillation dynamics of a U-shaped buckled membrane: a comparison with the leading-edge-clamped membrane
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NETL
NSTL
Springer Nature
Flow-induced oscillations (FIOs) of flexible membranes offer significant potential for renewable energy harvesting, but the performance variations between different membrane configurations lack quantification. This study experimentally compares two representative membrane configurations: a leading-edge-clamped membrane and a U-shaped buckled membrane, by analyzing their FIO dynamics, strain energy distributions, and energy harvesting capabilities using event-based camera measurements. Results demonstrate that the leading-edge-clamped membrane initiates a large-amplitude flapping mode above a critical wind speed threshold (10.3 m/s), with both amplitude and frequency escalating with wind speed. In contrast, the U-shaped membrane exhibits two FIO modes: a low-amplitude stream wise oscillation mode below 7.5 m/s and a high-amplitude snap-through oscillation (STO) mode beyond this threshold. Strain energy analysis revealed distinct energy concentration patterns: the flapping mode of the leading-edge-clamped membrane exhibited energy focal points at 0.18L and 0.70L (L = membrane length), whereas the STO mode of the U-shaped buckled membrane demonstrated triple concentration peaks at 0.43L, 0.76L, and 0.97L positions. Crucially, the STO mode achieves a 9.75-fold maximum strain energy enhancement over the flapping of the leading-edge-clamped membrane, demonstrating its superior energy harvesting efficiency. These findings establish quantitative benchmarks for membrane harvester design and provide actionable insights for optimizing piezoelectric material placement through strain energy localization.
Fluid-structure interactionSnap-through oscillationEnergy harvestingEvent-based camera
Zhen Lyu、Weiwei Cai、Benlong Wang、Yingzheng Liu
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Gas Turbine Research Institute, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
School of Ocean and Civil Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
NETL
NSTL
Springer Nature
