Dynamic buckling of wind turbine tower based on most unfavorable tower top displacement phase diagram method
LI Wanrun1,2,3,FAN Keyou1,DU Yongfeng1,2,3
1.Institute of Earthquake Protection and Disaster Mitigation,Lanzhou University of Technology,Lanzhou 730050, China; 2.Gansu Provincial International Science and Technology Cooperation Base on Seismic Mitigation and Isolation of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China; 3.MOE Engineering Research Center for Disaster Prevention and Mitigation of Western Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China
Abstract：Most of the wind turbine towers in my country are inevitably built in earthquake-prone areas, which are prone to dynamic buckling under the wind-earthquake coupling because they are thin-walled structures. Therefore, a 2.5 MW wind turbine in Northwest China was taken as a prototype to study the dynamic buckling of wind turbine tower under the coupling effect of wind and earthquake. First, the harmonic superposition method, the blade element momentum theory and the wake model were used to calculate the wind load on the wind turbine tower under operating conditions. Secondly, the finite element model of the wind turbine tower was established, and the influence of different loading angles on the dynamic response of the wind turbine tower under the wind, earthquake and wind-earthquake coupling was discussed. Finally, combined with the incremental dynamic analysis, a method based on the phase diagram method of the most unfavorable tower top displacement was proposed to study the dynamic buckling of the wind turbine tower under the wind-earthquake coupling, and its dominant factors were discussed. The results show that the effect of wind-earthquake coupling will lead to additional demands on the strength of the wind turbine tower. In determining the orientation of the door opening, the factors of wind-earthquake coupling should be considered. The wind turbine tower exhibits local plastic dynamic buckling under the wind-earthquake coupling, and the "phase diagram method of the most unfavorable tower top displacement" can accurately identify and analyze the dynamic buckling of the wind turbine tower.
李万润1，2，3,范科友1，杜永峰1，2，3. 基于最不利塔顶位移相图法的风电塔筒动力屈曲研究[J]. 振动与冲击, 2023, 42(23): 8-20.
LI Wanrun1,2,3,FAN Keyou1,DU Yongfeng1,2,3. Dynamic buckling of wind turbine tower based on most unfavorable tower top displacement phase diagram method. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(23): 8-20.
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