Abstract
Based on the equivalent stress, the fatigue life of corrugated plate component is simulated and its cost performance is calculated by using a simple model. Then, the research route is obtained, and the rationality of the structure parameters of the optimized welding joints is proved by physical test. It is found that the horizontal spacing between welding points has a significant effect on the fatigue life .As the horizontal spacing increases, the fatigue life decreases, and the trend is consistent with quadratic polynomial law. While, the row number of solder joints has no significant effect on the fatigue life for the upper and lower distance between the solder joints is too small. Considering the fatigue life and cost performance in a comprehensive way, it is a better welding spot structure parameter that the row number of solder joints is one, the left and right edge distance of welding points is 10 mm, the upper and lower edge distance is 4 mm, and the horizontal distance between welding points is 65.3 mm. At this point, the fatigue life simulation result is 2.06e6 times. Physical test shows that the actual fatigue life under this welding method is more than 2.0e7 times, which meets the requirement of working condition.
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