Fatigue Life Analysis and Evaluation of Multi-Pipe Water Brakes

Based on the S-N curve of the water brake device material, the nominal stress method was used to calculate the fatigue life by comparing the stress concentration coefficient and nominal stress of the structural fatigue danger part, combined with the fatigue damage accumulation theory. Through empirical formula combined with experimental correction, according to the t-distribution theory, the S-N curve of the water brake device material is obtained according to the confidence and error requirements. Combined with finite element simulation analysis, the load spectrum and danger point stress are extracted, and the fatigue simulation and analysis software is used to identify the danger point of the water brake device and calculate the fatigue life.