FPSO系泊系统参数的动力效应影响分析

利用水动力分析软件AQWA研究了内转塔式单点系泊参数对海上浮式生产储油船FPSO（floating production,storage and affcoading system）系统动力效应的影响特性,定量分析了内转塔位置、系泊缆材料分布、系泊缆预张力、系泊缆数量、系泊缆布置形式等参数对FPSO系统动力效应的影响,对每个系泊参数采取多个特征量进行比较分析,计算结果表明：转塔位置距船艏柱25%Lpp时风标效应及定位效果最好,多成分系泊缆材料分布采取下端钢链9%、聚酯缆90%、上端钢链1%时,系泊缆数量取9根且为3组×3根/组布置时定位效果最好,缆绳受力最小.以FPSO水平偏移量与系泊缆的安全系数为目标,提出了一套系泊系统的优选方案,计算结果表明系泊性能优良,与初步设计方案相比有了显著地提高.文中的计算及分析结果对内转塔式FPSO系泊系统的设计具有一定指导意义.

Analysis of the influence of mooring system parameters on dynamic response of FPSO system

In this paper,the influence of BTM（ Buoyant Turret Mooring） system parameters on dynamic response of FPSO system was analyzed by software AQWA. The influence of parameters,such as turret location, materials distribution,pre-tension of mooring lines,the number of mooring lines,layout of mooring lines etc., on dynamic response of FPSO system was analyzed quantitatively. Several characteristics were comparatively analyzed for each mooring parameter. The results showed that when turret was located at 25% Lpp,the system had best weather vane and positioning effect. If 9% chain,90% polyester,1% chain was taken as multi-component mooring line,and mooring lines were arranged as 3groups × 3 / group,the system would have positioning effect and the lines would have minimum force. An optimized proposal of mooring system was suggested by comprehensively considering the horizontal displacement of FPSO and the safety factor of mooring lines. The result showed that the optimized mooring system would have excellent performance,and it was significantly improved compared with the initial program. The conclusion will be helpful for the design of the BTM.