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vibration reduction control of a semisubmersible floating offshore wind turbine by the distributed tuned mass dampers under combined wind and wave excitations

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Zhendong Gongcheng Xuebao/Journal of vibration engineering 2024年第4期37卷 565-577页

作者： Luo, Yi-Fan Sun, Hong-Xin Wang, Xiu-Yong Chen, An-Hua Peng, Jian Zuo, Lei College of Civil Engineering Hunan University of Science and Technology Xiangtan411201 China Hunan Provincial Key Laboratory of Structural Engineering for Wind Resistant and Vibration Control Hunan University of Science and Technology Xiangtan411201 China School of Mechanical Engineering Hunan University of Science and Technology Xiangtan411201 China Department of Naval Architecture and Marine Engineering University of Michigan Ann Arbor48109 United States

To address the threat of harmful vibrations of semisubmersible floating offshore wind turbine（FOWT）in complex deep-sea environments to the safety and durability，a design of distributed tuned mass dampers（TMDs）is proposed to control the plat‑ form pitch motion under the randomly combined wind and wave excitations，in combination with the geometric structure of the 5MW prototype of NREL in the United States. The distributed TMDs are installed inside the platform to form an equilateral trian‑ gle arrangement. To better describe the performance of the distributed TMDs on the semisubmersible FOWT，a 9-degree-of-free‑ dom multi-body dynamics model is proposed and established for the coupled semisubmersible FOWT-TMDs system based on La‑ grange's equation and the modal superposition method. Based on the H∞ algorithm，whose optimization objective is the peak value of the frequency response function of platform pitch motion，the parameters of the distributed TMDs are optimally designed，where the coupling relationship between multiple TMDs is considered. The numerical simulation of the coupled FOWT-TMDs system under the combined wind and wave excitations is carried out to analyze the performance of the distributed TMDs on the platform pitch response of the wind turbine. The results show that the distributed TMDs with optimal design has good damping performance on the platform pitch motion of the semisubmersible FOWT. Under random wind and wave loads in three different working condi‑ tions，the peak and standard deviation vibration reduction rates of the power spectral density curve near the natural frequency of platform pitch can reach more than 39% and 52%，respectively. The research method and results can provide reference for dynam‑ ic analysis and vibration control design of large semisubmersible FOWT. © 2024 Nanjing University of Aeronautics an Astronautics. All rights reserved.

关键词： vibration control

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vibration control of nonlinear vibration of suspended cables based on quadratic delayed resonator

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Journal of Physics: Conference Series 2020年第1期1545卷

作者： Yiwei Tang Jian Peng Luxin Li Hongxin Sun Xianzhong Xie School of Civil Engineering Hunan Provincial Key Laboratory of Structures for Wind Resistance and Vibration Control Hunan University of Science and Technology Xiangtan Hunan 411201 PR China Department of Engineering Mechanics State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116023 PR China

Based on Galerkin method and multiple scales method, the first-order symmetric mode responses the suspension cable under longitudinal time-delayed velocity feedback control are obtained. The influence of system parameters, such as time delay, control gain and excitation amplitude on the controlled system, is investigated by the numerical examples. According to the feedback gain increasing, the amplitude of the system response is significantly suppressed. And the efficiency of vibration control can be improved by selecting control gain and the time-delay value.

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