深水FPSO时域耦合动力分析  

Coupled dynamic analysis of a deepwater FPSO in time domain

作　　者：郑成荣[1] 范菊[1] 缪国平 朱仁传[1] 袁梦[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《水动力学研究与进展（A辑）》2012年第4期376-382,共7页Chinese Journal of Hydrodynamics

基　　金：国家高技术研究发展计划(863计划)项目(2006AA09Z332);国家自然基金资助项目(50639020)~~

摘　　要：采用基于三维频域Green函数及傅里叶变换的间接时域法计算了浮体的水动力特性,并采用非线性有限元法对系缆进行了模拟。通过完全时域耦合分析方法求解系泊浮体的时域控制方程,得到了系泊浮体的运动响应和系缆的张力变化。针对一深水单点张紧式系泊的FPSO进行了理论计算,并将计算得到的浮体运动时历、系泊缆索上端点张力时历及相应统计结果与模型试验结果进行了对比,发现理论计算结果与模型试验结果吻合良好。该数值模型可用于深水浮体与系泊系统的耦合计算,计算结果可为进一步探讨深海系缆材料的非线性和疲劳断裂问题提供可靠的理论依据。3D Green＇s function and Fourier transform are adopted to calculate the hydrodynamic characteristics of the floating structure. The mooring lines are simulated using non-linear finite element method. By solving the equations of motion of the entire floating system by employing full time domain coupled analysis method, the vessel＇s motion response and mooring lines＇ tension are obtained. The numerical simulation is carried out for a deepwater single point turret-moored FPSO. The time history of FPSO＇s motions and mooring line tensions and statistic results are compared to the results of the corresponding model test. The comparisons show that the theoretical results are in good agreement with the test results. The numerical model can be used in the coupled analysis of deepwater moored vessels, and providing a reliable basis for the future investigation about the material nonlinearity and fatigue fracture analysis of deepwater mooring lines.

关 键 词：FPSO 系泊系统 时域 有限元法 耦合分析 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]