借助结构应力设计方案预估焊接零件寿命时 ,采用一种比较简单的有限元计算方法确定起决定作用的应力。在计算实践中恰好证明了这种方法的优点。然而为编制有限元网格一定要确立明确的方针。在这方面 ,供研究的设计结构至关重要。为此还介绍了另一种编制有限元网格的方法。为了进行比较 ,研究了按照Radaj的缺口应力集中方法的结果。疲劳强度实验有助于检验计算结果。 Using structural stress design to estimate the life of welded parts, a relatively simple finite element method is used to determine the decisive stress. In the calculation of the practice of this method proved the merits. However, for the preparation of finite element mesh must establish a clear guideline. In this respect, the design structure for research is crucial. To this end also introduced another method of preparation of finite element mesh. For comparison, the results of the notch stress concentration method according to Radaj were studied. Fatigue strength test helps to test the calculation results.