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ISSN 0254-0096 CN 11-2082/K

太阳能学报 ›› 2022, Vol. 43 ›› Issue (4): 304-310.DOI: 10.19912/j.0254-0096.tynxb.2020-0611

• 电化学储能安全性与退役动力电池梯次利用关键技术专题 • 上一篇    下一篇

超大功率风力发电机组塔筒屈曲分析

黄中华1,2, 刘喆1, 谢雅1   

  1. 1.湖南工程学院机械工程学院,湘潭 411104;
    2.新能源汽车轻量化湖南省工程研究中心,湘潭 411104
  • 收稿日期:2020-06-30 出版日期:2022-04-28 发布日期:2022-10-28
  • 通讯作者: 谢雅(1982—),女,硕士、副教授,主要从事计算机仿真与控制方面的研究。2829334628@qq.com
  • 基金资助:
    国家自然科学基金(51875193); 湖南省自然科学基金(2019JJ60039)

BUCKLING ANALYSIS OF LARGE WIND TURBINE TOWERS

Huang Zhonghua1,2, Liu Zhe1, Xie Ya1   

  1. 1. College of Mechanical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China;
    2. Hunan Engineering Research Center of New Energy Vehicle Lightweight, Xiangtan 411104, China
  • Received:2020-06-30 Online:2022-04-28 Published:2022-10-28

摘要: 以某型8 MW风力发电机组塔筒为对象,采用有限元方法开展超大功率风力发电机组塔筒屈曲特性分析。建立塔筒门洞段有限元模型,研究门框对塔筒屈曲稳定性的影响,结果表明:门洞加框能提高塔筒屈曲稳定性。为进一步提高塔筒屈曲稳定性,提出塔筒内壁设置加强筋的强化设计方法,研究加筋数目、加筋尺寸与塔筒屈曲稳定性的作用规律,结果表明:环筋数目为2、加筋尺寸为160 mm×18 mm时,加强方案最佳,塔筒的1阶屈曲特征值可提高55%。对带加强筋塔筒开展非线性屈曲分析,结果表明:塔筒临界屈曲载荷计算时不能忽略材料塑性、几何非线性以及初始缺陷的影响;初始缺陷程度的增加会导致塔筒临界屈曲载荷急剧下降,塔筒制造时应尽量降低初始缺陷程度。

关键词: 风力发电机, 塔筒, 非线性分析, 屈曲

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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