摘要
以风力发电机组塔筒的一段为研究对象,采用有限元方法计算塔筒理想状态下的弹性失稳临界应力,通过与工程算法对比验证有限元模型的准确性。基于有限元模型,提出了一种针对风机塔筒凹坑缺陷的分析方法,利用凹坑的环向、轴向和径向最大尺寸,通过加载方式制造出指定尺寸的凹坑缺陷,并针对凹坑位置、角度、尺寸等参数进行线性屈曲分析。结果表明:凹坑的存在会大幅降低塔筒的线性屈曲特征值,且特征值对凹坑缺陷的敏感程度由高到低排序为短轴和长轴比值、深度、位置、角度。
A section of a wind turbine tower is taken as the research object,and the finite element method is used to calculate the critical stress of elastic instability of the tower under the ideal state.The accuracy of the finite element model is verified by comparing it with engineering algorithm.Based on the finite element model,a method is proposed for analyzing the pit defect in wind turbine towers,using the maximum circumferential,axial,and radial dimensions of the pit.A pit defect of specified dimensions is created by loading,and a linear buckling analysis is carried out for the parameters of pit position,angle,and dimensions.The results show that the presence of the pit drastically reduces the linear buckling eigenvalue of the tower with the eigenvalues being sensitive to pit defect in the following descending order:short and long axis ratio,depth,position,and angle.
作者
王涛
孙仲泽
孙州
刘朝丰
翟乾俊
WANG Tao;SUN Zhongze;SUN Zhou;LIU Chaofeng;ZHAI Qianjun(Dongfang Electric Wind Power Co.,Ltd.,Deyang 618000,China)
出处
《技术与市场》
2024年第8期14-19,共6页
Technology and Market
基金
中央在川高校院所“聚源兴川”项目(2023ZHJY0012)
四川省科技计划资助(2023YFG0090)。
关键词
风力发电机塔筒
工程算法
有限元
屈曲分析
wind turbine tower
engineering algorithm
finite element
buckling analysis
