This paper presents numerical analyses of a welding simulation of a bogie frame side beam. The simulation is based on an analytical thermal model coupled with a non-linear structural finite element model using shell elements enabling the welding simulation of large structures. The predicted clamping forces, distortions, and residual stresses for different clamping conditions and plate thicknesses are analysed in terms of manufacture. A new fatigue model based on the endurance limit approach is proposed using residual stresses to predict the S-N curves. The predicted S-N curves with the proposed model showed close correlation with the S-N curves for class F and class F2 welds of the BS7608 standard, demonstrating its validity and potential use in design.

本文介绍了转向架侧梁焊接模拟的数值分析。该模拟基于分析热模型和非线性结构有限元模型，该模型使用壳单元实现大型结构的焊接模拟。在制造方面对不同夹紧条件和板厚的预测夹紧力、变形和残余应力进行了分析。提出了一种基于耐力极限方法的新疲劳模型，该模型使用残余应力来预测 SN 曲线。所提出模型的预测 SN 曲线与 BS7608 标准的 F 级和 F2 级焊缝的 SN 曲线密切相关，证明了其在设计中的有效性和潜在用途。