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Flow-Induced Vibration (FIV) energy harvesting is an effective approach for harnessing low-velocity ocean currents. Using a maglev support system to replace traditional metal springs enables better stiffness adjustment and improves underwater operation and maintenance performance. To enhance energy output and stability, dual-oscillator designs are widely used in vortex-induced vibration energy harvesters. However, the vibration characteristics of dual oscillators supported by maglev systems remain underexplored. This study establishes a coupled numerical model that integrates the FIV of rigid cylindrical oscillators with a maglev support system to investigate the influence of the spacing ratio (G/D) on their vibration responses. Results show that a smaller spacing ratio (G/D=2) intensifies hydrodynamic interactions, leading to a downstream oscillator's amplitude reaching over twice that of a single oscillator. The oscillation frequencies decrease monotonically with increasing spacing ratios, and distinct frequency variation patterns are observed between upstream and downstream oscillators. Vortex analysis reveals that the upstream wake reconstructs the flow field and strengthens the excitation forces on the downstream oscillator, thereby amplifying its vibration response. The maglev effect enhances the oscillators' responsiveness to flow field changes through nonlinear magnetic forces, further improving vibration performance and system stability. This study provides theoretical insights for optimizing dual-oscillator FIV energy harvesters with maglev support.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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