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<p>Floating offshore wind turbines (FOWTs) are extensively utilized in offshore energy development. However, FOWTs are vulnerable to pitch motion, and high-frequency pitch motion may result in structural damage, equipment failure, and associated hazards. To suppress the undesired pitch motion of FOWTs, this paper presents an innovative Rotating Plates Tuned Mass Damper (RPTMD) system designed according to the natural frequency characteristics and spatial features of FOWTs. The motion equations of the RPTMD-FOWT system are established based on the TMD similarity principle. Through numerical modeling, parameters including rotating plate size, tuning ratio, and damping ratio are systematically examined. Furthermore, a comprehensive three-dimensional motion response model of floating body-wave-mooring interaction is developed to assess the RPTMD system’s effectiveness in FOWT motion control under extreme loading conditions. The motion suppression effect is evaluated using displacement peaks and displacement mean-square responses of the main mass. The energy dissipation characteristics of RPTMD are quantitatively analyzed through damping moments. Results indicate that the RPTMD exhibits optimal damping capability under resonant excitation, with a rotational inertia ratio of 0.7% achieving pitch suppression efficiency of 38.92% and heave suppression efficiency of 31.12%.</p>

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Study on a Rotating Plate Tuned Mass Damper (TMD) for Mitigating Motion of Floating Offshore Wind Turbines

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Shu-ling Chen,
  • Fu-yin Cui,
  • Chang-zhi Han,
  • Rui-dong Ni,
  • Shi-qiang Yan

摘要

Floating offshore wind turbines (FOWTs) are extensively utilized in offshore energy development. However, FOWTs are vulnerable to pitch motion, and high-frequency pitch motion may result in structural damage, equipment failure, and associated hazards. To suppress the undesired pitch motion of FOWTs, this paper presents an innovative Rotating Plates Tuned Mass Damper (RPTMD) system designed according to the natural frequency characteristics and spatial features of FOWTs. The motion equations of the RPTMD-FOWT system are established based on the TMD similarity principle. Through numerical modeling, parameters including rotating plate size, tuning ratio, and damping ratio are systematically examined. Furthermore, a comprehensive three-dimensional motion response model of floating body-wave-mooring interaction is developed to assess the RPTMD system’s effectiveness in FOWT motion control under extreme loading conditions. The motion suppression effect is evaluated using displacement peaks and displacement mean-square responses of the main mass. The energy dissipation characteristics of RPTMD are quantitatively analyzed through damping moments. Results indicate that the RPTMD exhibits optimal damping capability under resonant excitation, with a rotational inertia ratio of 0.7% achieving pitch suppression efficiency of 38.92% and heave suppression efficiency of 31.12%.