Research on anti-fatigue design method for welded joints of marine engineering equipment

Purpose To obtain better fatigue resistance for marine engineering equipment welded joints in the design stage, the design method of the marine engineering equipment welded joint design stage needs to be studied. Design/methodology/approach Based on the structural stress theory, a design method of the marine engineering equipment welded joints with better fatigue performance is proposed. The effectiveness of the method is demonstrated through the simulation analysis and fatigue test of typical marine engineering equipment welded joints. Findings Methods based on the theoretical advantages of structural stress and the principle of ensuring that the welded joint has a low degree of stress concentration. Originality/value The design method of marine engineering equipment welded joints proposed in this study provides a set of operable design routes for technicians, which can better meet the needs of engineering applications.