锚链预张力对FDPSO运动响应的影响

作为一种综合性浮式平台,浮式钻井生产储油船简称FDPSO,具备石油钻探、生产、储备等功能,是在浮式生产储油船的基础上发展而来.FDPSO主要工作于海况比较恶劣的深水海域,因而如何准确预报FDPSO的运动响应和锚链的预张力非常必要.本文基于时域耦合方法对FDPSO运动响应和锚链的预张力进行预报,在此基础上将数值结果与试验结果进行对比以验证理论计算的可靠性.通过改变锚链线的预张力来研究预张力对FDPSO运动响应的影响.文中提供了运动响应的时历曲线和响应谱,并对比分析其中的异同,结果表明锚链预张力对纵荡、横荡和横摇运动的响应影响比较大.

The effect of mooring line pre-tension on FDPSO's motion

As a multifunction floating platform, Floating Drilling, Production, Storage and Offloading (FDPSO) com-bining the well-known Floating Production, Storage and Offloading (FPSO) with a drilling unit. For the environment condi-tion of deep-water oilfield is very severe, the motion response and mooring line tension of FDPSO is a worthy topic of study-ing. In this study, the numerical time-domain coupled prediction method for the mooring line tension and motion response of FDPSO system is constructed by Ansys AQWA software. Furthermore, the results of a model test conducted in Harbin En-gineering University are used to investigate the feasibility and validity of the commercial simulation. The effect of mooring line pre-tension on the response of FDPSO is studied by varying the pre-tension of mooring line during the calculation. The time series curve of the mooring line tension and motion response, and the comparison of motion spectrum and mooring line tension spectrum are provided in this article. The findings from this study have shown the pre-tension of mooring line has considerable influence on the surge, sway and roll motion's spectrum density distribution.