Numerical Simulations and Control of Offshore Energy Harvesting Using Piezoelectric Materials in a Portal Frame Structure

Figure 7

(a) Frequency response of the portal frame excited around the resonance 0 ≤ α₅ ≤ 2.5 (0 ≤ f₁ ≤ 25.52 (Hz)), around low-frequency ocean waves. (b) Harvested power obtained through equation (8). Both results show the comparison before the optimization, after the optimization, and with control.

(a)

(b)