金属加工（热加工）Issue(1)：79-84,6.
不同热输入下风电机组塔筒筒节焊缝应变自动分析
Automatic analysis of welding seam strain of wind turbine tower section under different heat inputs
摘要
Abstract
If only the stress state of the wind turbine tower welded structure under load is analyzed,this neglects the combined effect of heat input and load on the main stress of the weld seam,leading to increased the errors of strain calculation.To this end,research is conducted on the automatic analysis of weld seam strain in wind turbine tower sections under different heat inputs.Firstly,a simplified finite element model of the weld seam of the wind turbine tower section is constructed to calculate the load on the weld seam of the tower;Secondly,the classic 3D double ellipsoid heat source model is used to determine the magnitude of heat input during the welding process of tower tube sections;Once again,analyze the relationship between heat input and load,and calculate the principal stress of the weld seam of the tower section using the hot spot stress method based on the three load components;Finally,based on the changes in heat input magnitude and its impact on the main stress of the weld seam,combined with the calculation results of the main stress of the weld seam,automatic analysis of the weld seam strain is achieved.The experimental results show that the proposed method highly overlaps with the pre-set actual strain values,with a strain value error of no more than 1％,and can accurately monitor the strain state of the weld seam of the wind turbine tower section.关键词
风电机组塔筒筒节/焊缝应变/热输入/有限元仿真/3D双椭球热源模型/热点应力法Key words
wind turbine tower section/weld seam strain/heat input/finite element simulation/3D double ellipsoid heat source model/hot spot stress method引用本文复制引用
吴辰华,赵俊杰..不同热输入下风电机组塔筒筒节焊缝应变自动分析[J].金属加工（热加工）,2026,(1):79-84,6.基金项目
福建省教育厅科技项目(JA13233) （JA13233）
厦门市重大科技项目(3502Z20111008). （3502Z20111008）
