Evaluating effectiveness of multiple tuned mass dampers for vibration control of jacket offshore wind turbines under onshore and seafloor earthquakes  

作　　者：Pan Zuxing Liu Yingzhou Wang Wenhua Li Xin Zhao Shengxiao Jiang Zhenqiang Shang Jin 

机构地区：[1]Renewable Energy Engineering Institute,Power China Huadong Engineering Corporation Limited,Hangzhou 311122,China [2]State Key Laboratory of Coastal and Offshore Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China [3]Institute of Earthquake Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China [4]School of Civil Engineering and Architecture,Guangxi University for Nationalities,Nanning 530006,China

出　　处：《Earthquake Engineering and Engineering Vibration》2023年第4期1045-1063,共19页地震工程与工程振动（英文刊）

基　　金：National Natural Science Foundation of China under Grant Nos.52001052 and 51939002。

摘　　要：The dynamic characteristics and structural responses of operation and grid loss offshore wind turbines(OWTs)under onshore and seafloor earthquakes are analyzed based on the established coupled seismic analysis model.In addition to the remarkable influence of the rotor system on the responses of the operation OWT under earthquakes,interactions among the natural modes of the grid loss OWT in the fore-aft and side-to-side directions are revealed.By comparing with the onshore earthquakes,the more significant differences of structural response are observed under the selected seafloor earthquakes,due to the longer duration and more abundant energy distribution around the natural frequencies of OWT.Concurrently,a multiple tuned mass damper(MTMD)is designed and applied to the operation and grid loss OWTs.Then,the comparisons of the mitigation effects under onshore and seafloor ground motions are carried out,and the necessity of applying seafloor ground motions to OWTs are proved.Moreover,in comparison to the operation OWT,more effective reductions are observed for the grid loss OWT under onshore and seafloor earthquakes using the designed MTMD.Therefore,the combined shutdown procedures and MTMD vibration control strategy is suggested for OWTs under earthquakes.

关 键 词：offshore wind turbine EARTHQUAKE vibration control coupled analysis MTMD 

分 类 号：TM315[电气工程—电机] P752[天文地球—海洋科学]