机电工程技术2023，Vol.52Issue(12)：167-170,4.DOI:10.3969/j.issn.1009-9492.2023.12.039
基于表面外推法的结构热点应力计算方法研究
Research on the Calculation Method of Structural Hot Spot Stress Based on Surface Extrapolation Method
许波 1赵春雨 1柳胜举 1黄文杰 1秦瑞冰1
作者信息
- 1. 明阳智慧能源集团股份有限公司,广东中山 528400
- 折叠
摘要
Abstract
To obtain accurate structural hot spot stress and ensure the reliability of fatigue life of wind turbine components,finite element models of wind turbines are established with different grid dimensions and element types on fixtures,the effects of grid dimension,element types,and extrapolation methods on the calculation results of hot spot stress in welded joint structures are studied.The results show that the structural hot spot stress shows a trend of first increasing and then decreasing with the refinement of the grid dimension,reaching its peak at a grid dimension of 0.33t.The calculation results of the tetrahedral element model are conservative and more significantly influenced by the grid dimension,and have high requirements for grid dimension.The maximum difference in calculation results between two extrapolation methods for tetrahedral models with different grid dimensions is 13.56%.The difference in the calculation results of the hexahedral element model using two extrapolation methods is within 10%.As the mesh refinement approaches,the calculation results of the two extrapolation methods gradually approach.When the grid dimension is refined to 0.2t,the structural hot spot stress of the hexahedral element model only differs by 1.87%.关键词
表面外推法/结构热点应力/网格精度/单元类型Key words
surface extrapolation method/structural hot spot stress/grid dimension/element type分类
能源科技引用本文复制引用
许波,赵春雨,柳胜举,黄文杰,秦瑞冰..基于表面外推法的结构热点应力计算方法研究[J].机电工程技术,2023,52(12):167-170,4.
