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综合考虑高强钢箱形轴压和偏压构件初始缺陷(整体、局部初弯曲)、残余应力以及几何、材料非线性的影响,采用有限元软件ANSYS建立有限元模型,并利用已有试验数据分析网格划分方式、初始缺陷施加形式等对有限元模型计算结果的影响。研究结果表明,采用残余应力文件进行两次导入,能获得较好的残余应力模拟效果;单元纵横比控制在1∶3之内时,能保证有限元模型得到较好的分析结果;基于本文分析所建立的有限元模型能很好地模拟相关构件。
Considering the initial defects of box-shaped axial compression and high-strength steel (global and local initial bending), residual stress and the influence of geometry and material nonlinearity, finite element software ANSYS was used to establish the finite element model. Based on the existing experimental data The influence of the meshing method, the initial defect application form and so on on the calculation results of the finite element model. The results show that the residual stress file can be imported twice to obtain better simulation results of residual stress. When the aspect ratio of the element is controlled within 1: 3, the finite element model can get a better analysis result. Based on this analysis The established finite element model can well simulate the related components.