Ocean Engineering 330(2025)121301

Keywords:  Fluid-structure coupling  Vortex-induced vibration  Vortex shedding  Active contro

 Vortex-induced vibration (VIV) of hydrofoils poses significant challenges to underwater equipment and marine  engineering, involving the coordinated optimization of structural safety and acoustic performance. This study  proposes an active control strategy based on piezoelectric materials to effectively suppress vibration and noise  through vortex shedding frequency modulation under fluid-structure interaction conditions. By establishing a  bidirectional fluid-structure coupling simulation model, we systematically investigated the torsional vibration  response and resonance mechanisms of hydrofoils under various flow velocities, revealing dynamic influence  patterns of velocity variations on wake vortex shedding and acoustic field characteristics. The mechanism of  active control on structural vibration energy dissipation and flow field pressure distribution was elucidated  through excitation amplitude and frequency regulation. Experimental studies employing Macro Fiber Composite  (MFC) and particle image velocimetry (PIV) validated the active modulation characteristics of wake vortex  shedding. Results demonstrate that piezoelectric excitation can significantly alter boundary layer evolution on  hydrofoil surfaces, adjust vortex shedding frequencies, mitigate resonance risks, and optimize acoustic field  distribution. This research provides a novel technical approach for vibration control in complex fluid-structure  coupling systems and active acoustic signature regulation.

Jinliang Wu, Pengxiang Zhao, Xin Lan, Jinsong Leng, Yanju Liu

Analysis and active control of vortex-induced vibration of hydrofoil.pdf