Stability analysis of floating wind turbine structure with turned mass damper-nonlinear energy sink

Abstract

The conventional tuned mass damper (TMD) has the defect of a narrow tuning band in the stability control of a floating wind turbine (FWT). In this paper, a hybrid vibration reduction method of tuned mass damper-nonlinear energy sink (TMD-NES) is proposed, which makes full use of the broadband advantage of NES and can effectively avoid its initial energy sensitivity disadvantage. A FWT dynamics model with TMD-NES was established, the complex variable average method was used to solve the dynamic response of the system, and the Runge–Kutta method is used to prove the reliability of the analytical method. The bifurcation characteristics of NES and the vibration suppression effect of TMD-NES are analyzed and discussed. The results show that the proposed method reduces the peak energy of the tower surge response by 95.3%, broadens the frequency band of vibration reduction, reduces the sensitivity to the initial energy, and improves the robustness of the system.

Forecasting Pitch Response of Floating Offshore Wind Turbines with a Deep Learning Model

“…The pitch motion of floating wind turbine platforms is essential to structural stability, optimal performance, and long-term reliability [39]. Effective pitch control stabilizes power output, reduces vibration, and maintains aero-servo-elastic stability [40,41]. Advanced control systems and strategies, such as tuned mass dampers and pitch control schemes, reduce platform motion and dynamic loads, enhancing the overall efficiency and robustness of floating wind turbines [42].…”