Fatigue Strength Assessment of Aged Floating Production System Available to Purchase

Fatigue is one of the most frequent causes of failure for offshore structures subjected to environmental loads, especially aged structures. An effective method for calculating the fatigue damage of aged platform under regular wave is presented. Three-dimensional source distribution theory in the frequency domain is used to calculate fatigue load of FPS in regular wave. The hot spot stress in the welded knuckles is calculated on the basis of a detailed finite element model. Based on the S-N curve and the Miner linear accumulative damage theory, the calculation process of fatigue damage of components was simplified. The calculated results show that this computing method is convenient and accurate. It is suitable for engineering application.