BUCKLING ANALYSIS OF LARGE WIND TURBINE TOWERS

Huang Zhonghua; Liu Zhe; Xie Ya

doi:10.19912/j.0254-0096.tynxb.2020-0611

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (4) : 304-310. DOI: 10.19912/j.0254-0096.tynxb.2020-0611

Topics on Key Technologies for Safety of Electrochemical Energy Storage Systems and Echelon Utilization of Decommissioned Power Batteries

BUCKLING ANALYSIS OF LARGE WIND TURBINE TOWERS

Huang Zhonghua^1,2, Liu Zhe¹, Xie Ya¹

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Abstract

Taking a certain type of 8 MW wind turbine tower as the research object, this paper provides a detailed analysis of buckling features of large wind turbine towers by applying the finite element method. A finite element model of the gate section of the tower is established to study the influence of the door frame on the buckling stability of the tower. The results show that adding a frame to the gate can improve the buckling stability of the tower. In order to further improve the buckling stability of the tower, an updated design method to equip stiffeners on the inner wall of the tower, is proposed, in which the influences of the number and size of stiffeners on the buckling stability of the tower is researched. It is found that the best buckling stability of the tower can be achieved when two ring reinforcements with a dimension of 160 mm×18 mm are used, which means a 55% increase of the first-order buckling eigenvalue. It also carries out a nonlinear buckling analysis of the tower with stiffeners, showing that the influence of material plasticity, geometric nonlinearity, and initial defects cannot be neglected in the calculation of the critical buckling load of the tower. The critical buckling load will decrease sharply when the initial defect degree in creases. Therefore, the initial defect degree should be minimized during the manufacturing process of the tower.

Key words

wind turbines / towers / nonlinear analysis / buckling

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Huang Zhonghua, Liu Zhe, Xie Ya. BUCKLING ANALYSIS OF LARGE WIND TURBINE TOWERS[J]. Acta Energiae Solaris Sinica. 2022, 43(4): 304-310 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0611

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