Experimental study on seismic vibration control of an offshore wind turbine with TMD considering soil liquefaction effect

Ging Long Lin, Lyan Ywan Lu, Kai Ting Lei, Kuang Yen Liu, Yung Yen Ko, Shen Haw Ju

研究成果: Article同行評審

摘要

Wind energy is clean and sustainable. Taiwan is establishing offshore wind farms using wind turbines in the Taiwan Strait. However, these are located in an earthquake-prone area with sandy seabed conditions. To ensure their safety and reliability, the turbines’ support structure must be protected against wind, waves, and seismic loads. Tuned mass dampers (TMDs) are commonly employed to reduce structural vibrations. A TMD is more simply incorporated into turbine structures than are other energy dissipation devices. In this study, a 1:25-scale test model with a TMD was constructed and subjected to shaking table tests to experimentally simulate the dynamic behavior of a typical 5-MW wind turbine with a jacket-type support structure and pile foundation. The scaled-down wind turbine model has a nacelle without rotating blades; therefore, the aerodynamic and rotational effects due to the rotating blades were ignored in this study. A large laminar shear box filled with saturated sandy ground was used to simulate the typical seabed conditions of Taiwanese offshore wind farms. The TMD system was designed to be tuned the first-mode frequency of the test model. Two ground accelerations, selected by considering wind farm site condition and near-fault characteristics, were used for excitation in the test. The responses of the test model with and without the TMD system were compared, and the influence of soil liquefaction on the effectiveness of TMD vibration control was addressed.

原文English
文章編號102961
期刊Marine Structures
77
DOIs
出版狀態Published - 2021 五月

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 海洋工程
  • 材料力學
  • 機械工業

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