实验和研究工作表明，FPSO系泊系统恢复刚度为分段线性特性。
Many experiments and research work indicate that the restore stiffness of FPSO mooring system is piece-wise linearity.
以三阶非线性操纵运动微分方程为基础导出了系泊系统运动响应的数学模型，得到了静态分岔方程。
A nonlinear three order vessel maneuvering mathematical model was used to establish the motion differential equations of mooring systems subjected to current.
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