极端海况下深水单点系泊系统FPSO运动响应分析

Single-point mooring FPSO responses analysis in extreme sea conditions

针对500年一遇的极端海况条件,对15万吨深水单点系泊系统FPSO的运动响应和系泊线受力特性进行了研究,为FPSO后续的基本设计和详细设计提供技术分析依据.基于水动力计算软件AQWA和ORCAFLEX,分别研究了500年一遇海况波浪主控环境条件、风主控环境条件、流主控环境条件对15万吨深水单点系泊FPSO运动响应的影响.计算结果表明:压载状态下运动响应幅值普遍大于满载状态下的运动响应幅值,波浪主控环境条件对FPSO运动响应的影响要明显大于风流主控环境条件,且风浪流成夹角作用时FPSO运动响应更大.

The motion responses and mooring strength of a 150 000-ton FPSO in 500-year extreme sea conditions have been studied , and technical analysis for the basic design and detailed design of the FPSO is provided .The effects of 500-year wave dominated condition ,500-year wind dominated condition and 500-year current dominated condition on 150 000-ton single-point mooring FPSO motion response have been calculated by AQWA and OR-CAFLEX.The calculation results show motion responses in ballast condition are bigger than those in fully loaded condition, and motion responses of 500-year wave dominated condition are bigger than that of 500-year wind and current dominated condition .When directions of wave , wind and current are at angles , the motion responses are large.