基于热点应力法对转向架构架加强筋板的焊接处进行疲劳强度分析,通过建立疲劳热点位置结构的有限元模型,采用最有可能发生疲劳破坏部位处的应力幅值作为疲劳评定依据,采取不同的工艺设计方案,选取最有可能发生破坏的热点位置进行分析,其分析方法埘运用热点应力法进行转向架结构的疲劳强度分析具有一定的参考价值。
The fatigue strength of the welding point of the enforcedplate for the bogie frame deep floor is analyzed with the hot spot stress method. The finite element model is built for the hot-spot position structure. The stress amplitude of the spots where the fatigue damage most possibly happen is taken as the basis for fatigue evaluation. With different design programs, the hot spots where the fatigue damage most possibly happen are selected for the analysis. The analysis method is referential for the fatigue strength analysis of the bogie structure.