New Strategy on Power Absorption of a Concentric Two-Body Wave Energy Converter

The wave energy converter (WEC) system, which extracts electricity through the relative heave motion of two concentric cylinders, comprises an inner cylinder and a torus-type outer sliding along cylinder. To maximize between natural frequencies cylinders must be precisely tuned to resonate situated on each side peak frequency spectrum. However, demerit this strategy is that it demands deep draft for tuning, large-scale PTO damping device necessary mechanical power amplified by resonance. As alternative efficient stable WECs, we adopt new in follows incoming waves one restricted minimal using disk. viscous due formation vortices at disk edge realized drag force Morison equation. developed hydrodynamic model two-body WEC based matched eigenfunction expansion method (MEEM) applied irregular characterized significant height period. It found present with produces stably across wide range compared previous WECs