软刚臂单点系泊FPSO是浅水油田广泛采用的油气开采设备。为研究单点系泊系统的受力性能，针对一艘作业于浅水油田的16万吨级软刚臂单点系泊FPSO，在线性三维势流理论的基础上，基于多体动力学方法建立FPSO-系泊腿-软刚臂的耦合模型，在时域内计算软刚臂单点系泊系统（SYMS）的动力响应特性；并进行软刚臂单点系泊系统参数敏感性分析，研究软刚臂系泊系统的系泊点高度、系泊刚架高度、软刚臂长度、系泊腿长度、压载舱重量等设计参数的变化对系统动力响应性能的影响。结果表明：单点载荷和系泊腿轴向载荷随着系泊点高度、系泊刚架高度和压载重量的增加先减小后增大，而随着软刚臂长度、系泊腿长度的增加则是先增大后减小；且单点载荷对软刚臂长度和压载重量这2个参数的变化最为敏感，而系泊腿轴向载荷则对系泊刚架高度、软刚臂长度这2个参数的变化最为敏感。%With the aging of FPSO and mooring systems, accidents could occur and pose certain threats on the safety of production in the oil field. Based on the multi-body dynamics theory, a multi-body coupling model, including the soft yoke system and FPSO, is established in this paper. The dynamic response of the Soft Yoke Mooring System (SYMS) is calculated in the time domain based on the linear 3-D potential theo-ry. By selecting different design parameters, such as the height of single point mooring and mooring frames, the length of pendant and soft yoke, and the ballast weight, the sensitivity of force to design parameters of the soft yoke mooring system is analyzed. Results show that the loads on the single point and the pendent decrease first and increase afterward along with the increase of height of single point, height of mooring frame and the ballast weight;while these loads increase first and decrease afterward versus the increase of length of pendant and length of soft yoke. In brief, the loads on the single point are most sensitive to the change of length of soft yoke and ballast weight while the loads on the pendent are most sensitive to height of single point and length of soft yoke.
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