ANTI-seismic of Offshore Wind Turbine with TMD Based on VMD Method

doi:10.3901/JME.2022.04.155

Abstract

Abstract: In order to study the TMD vibration control effect of large-scale monopile offshore wind turbine structure, the soil displacement time domain response is used as the seismic excitation when the measured earthquake occurs, and the nonlinear soil-structure coupling model constructed by the Winkler model and the p-y curve method is used to simulate the process of energy transfer from the earthquake to the wind turbine. Taking the NREL 5 MW large single-pile offshore wind turbine as the research object, the finite element model is established to study the effect of TMD on the supporting structure in sudden earthquake and the transient dynamic response, the time domain results are analyzed using the VMD method. The effect of TMD on offshore wind turbine is analyzed from different frequency. The results show that the sudden earthquake caused a sharp and severe tremor at the top of the tower, and the cabin acceleration surged. When the earthquake occurs, the obvious phase difference between the TMD and the displacement response of the wind turbine tower is the main mechanism for the passive control of the wind turbine during the earthquake. The TMD has better control effect on the high-frequency component of the tower top displacement and the cabin acceleration response. It guarantees the stable operation of many important parts at the top of the tower.

Key words: offshore wind turbine, tuned mass damper, seismic, dynamic response, variational mode decomposition

CLC Number:

TK83

YAN Yangtian, LI Chun, YANG Yang, MIAO Weipao, LI ZhiHao. ANTI-seismic of Offshore Wind Turbine with TMD Based on VMD Method[J]. Journal of Mechanical Engineering, 2022, 58(4): 155-164.

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