船艏装载原油外输软管动力影响因素分析

Research on Dynamic Response of Crude Oil External Hose at Bow Loading

针对船艏装载原油外输软管安全作业问题,进行软管动力响应影响因素分析。基于集中质量法,建立船艏外输漂浮软管与穿梭油轮和FPSO的整体耦合动力分析模型,分析影响软管受力的影响因素,在此基础上确定软管受力最小的方案,并给出软管安全作业的环境工况。计算结果表明,在作业工况下设计漂浮软管管串长度为170.6 m,FPSO与穿梭油轮的距离为80 m,此时软管的有效张力最小。提出软管的极限作业工况范围为流速1.1 m/s,浪高7 m。研究提出的软管外输方案可为船艏外输漂浮软管设计提供参考。

Aiming at the problem of safe operation of the floating export hoses used for bow loading of crude oil,the influence factors of hose dynamic response were analyzed.Based on the lumped mass method,a comprehensive coupled dynamic analysis model was established for the floating export hoses connecting the shuttle tanker and the FPSO unit.By analyzing influence factors of hose loadings,the configuration of minimum stress on the hose was determined,as well as the environmental conditions for safe operations of hose.The calculation results indicate that under operational conditions,the optimal length for the floating hose string is 170.6 m,the distance between the FPSO and the shuttle tanker is 80 m,resulting in minimal effective tension on the hose;the extreme operational conditions for the hoses are a current speed of 1.1 m/s and wave heights of up to 7 m.The proposed export hose scheme can provide reference for the design of floating export hoses for bow loading.