深海FPSO一般由多根锚泊线组成的系泊系统进行定位，为保证结构的安全性，开展锚泊线疲劳强度评估分析显得至关重要。本文采用改进的雨流计数法结合T-N曲线和Miner线性疲劳累计损伤理论对某FPSO锚泊线进行疲劳性能分析。针对锚泊线的疲劳损伤，分析其疲劳损伤的不利位置，从而为FPSO系泊系统的维护提供重要依据。%The mooring system of FPSO composed of multiple mooring lines. It is critical to evaluate the fatigue strength of the mooring line to guarantee the safety of the structure. In this paper improved rain-flow count method, T-N curve and Miner linear fatigue cumulative damage theory were used to evaluate the fatigue performance of mooring line. From the analyses of the fatigue damage of mooring line, we can get the information of the disadvantageous position, which provide important basis for the maintenance of FPSO mooring system.
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