基于实测数据的系泊系统疲劳时变可靠性评估

Study on Fatigue Time-varying Reliability Evaluation Method of Mooring System Based on Measured Data

FPSO系泊系统在复杂服役环境下的疲劳可靠性问题是其在役状态评估的重点。基于船体运动监测数据,结合系泊力监测方法与时变可靠性计算方法,综合考虑海洋载荷的季节性变化与系泊链均匀腐蚀的影响,完善时变可靠性模型,针对内转塔系泊系统开展疲劳时变可靠性评估分析。

The fatigue reliability of FPSO mooring system in complex service environment is the focus of its in-service state evaluation.A fatigue time-varying reliability assessment method was developed based on platform motion monitoring data,combined with mooring force monitoring methods and time-varying reliability calculation methods.In addition,the model was improved by considering the seasonal changes of ocean loads and the uniform corrosion of the mooring chain.An example was given for the fatigue time-varying reliability evaluation and analysis of an inner turret mooring system.