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利用线弹性断裂力学（ＬＥＦＭ）理论、迭加原理和有限元分析方法，就残余应力对对焊接头的疲劳性能的影响进行了理论分析。采用有限板中边界裂纹及中心穿透裂纹的Ｂｕｅｃｋｎｅｒ及Ｋａｎａｚａｗａ权函数，计算对应对焊接头中的各种残余应力分布的残余应力强度因子。建立了考虑不同残余应力水平影响的表面裂纹疲劳模型，估算对焊接头疲劳寿命及疲劳强度，并与试验数据进行比较验证。
The effects of residual stresses on the fatigue properties of welded joints were theoretically analyzed using the theory of linear elastic fracture mechanics (LEFM), superposition principle and finite element analysis. Using the Bueckner and Kanazawa weight functions of the boundary crack and the center-penetrating crack in the finite plate, the residual stress intensity factor corresponding to various residual stress distributions in the welded joint is calculated. The fatigue crack fatigue model considering the influence of different residual stress levels was established, and the fatigue life and fatigue strength of the welded joints were estimated. The results were compared with the experimental data.