Volume 16, Issue 3 (7-2026)
IJOCE 2026, 16(3): 355-373 |
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Fahimi Farzam M, Ziamehr A. OPTIMUM VIBRATION CONTROL OF OFFSHORE WIND TURBINES USING MTMD UNDER SIMULTANEOUS EFFECT OF WIND AND WAVE LOADS. IJOCE 2026; 16 (3) :355-373
URL: http://ijoce.iust.ac.ir/article-1-681-en.html
URL: http://ijoce.iust.ac.ir/article-1-681-en.html
1- Department of Civil Engineering, University of Maragheh, Maragheh, Iran & Department of Civil Engineering, Sahand University of Technology, Tabriz, Iran
2- Department of Civil Engineering, University of Maragheh, Maragheh, Iran
2- Department of Civil Engineering, University of Maragheh, Maragheh, Iran
Abstract: (122 Views)
Considering the depletion of fossil fuel resources and their environmental impacts, offshore wind energy has emerged as a promising renewable solution. However, floating offshore wind turbines (FOWTs) are exposed to complex aerodynamic and hydrodynamic loads, particularly under combined wind and wave excitation, which can lead to excessive vibrations and fatigue damage. Therefore, effective vibration control strategies are essential to enhance structural reliability and durability. This study investigates the dynamic behavior and vibration mitigation of a floating offshore wind turbine supported by a Tension Leg Platform (TLP) under moderate, high, and extreme wind-wave conditions. A coupled model was developed using FAST-SC, and Multi-Tuned Mass Damper (MTMD) systems were implemented as passive control devices. The optimal MTMD parameters and installation layouts were determined, and their effectiveness in reducing tower and platform responses was evaluated. The results demonstrate that the optimized MTMD systems significantly improve the dynamic performance of the FOWT, achieving maximum reductions of 34% in tower fore-aft displacement, 43% in platform roll motion, and 41% in tower-base bending moment compared with the uncontrolled case. These reductions indicate the capability of MTMD systems to suppress structural vibrations, mitigate fatigue accumulation, and enhance the long-term reliability of offshore wind turbines. Consequently, the proposed approach has the potential to extend the service life of critical structural components and reduce maintenance requirements and life-cycle costs. This study provides valuable insights for the design of reliable and durable floating offshore wind turbines operating in harsh marine environments.
Keywords: Floating offshore wind turbine, Tension Leg Platform, Multi-Tuned Mass Damper, Passive vibration control, Dynamic response mitigation
Type of Study: Research |
Subject:
Optimal design
Received: 2026/06/2 | Accepted: 2026/07/29 | Published: 2026/08/1
Received: 2026/06/2 | Accepted: 2026/07/29 | Published: 2026/08/1
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