缆绳非线性刚度对深海系泊系统的影响  

Influence of Nonlinear Stiffness on Deep Mooring System

作　　者：丁海建[1] 钱佳煜[2] 陶俊[1] 

机构地区：[1]中国船舶重工集团公司第704研究所,上海200031 [2]哈尔滨工程大学船舶工程学院,哈尔滨150001

出　　处：《船舶工程》2015年第4期84-87,97,共5页Ship Engineering

摘　　要：聚酯缆绳因其质轻、无腐蚀而多用于深海系泊系统。聚酯缆绳的材料非线性决定了在实际工程应用中,轴向刚度表现为非线性特性。针对此特性,以动态时域方法分析聚酯缆绳的数值模型,在风、浪、流的环境载荷作用下,考虑FPSO的耦合作用,采用多项式函数拟合了聚酯缆绳的非线性刚度,求解了多点系泊FPSO的运动响应及其系泊系统的张力值。同时采用缆绳线性刚度计算了多点系泊FPSO的总体运动响应,对比两种数值计算结果,可以发现采用非线性刚度拟合方法得到的船体位移偏大而缆绳张力值变小,非线性刚度更能准确描述船体真实运动及缆绳的张力变化,对以后优化锚泊系统的设计有着重要的意义。Due to the fact that polyester rope has light weight and non-corrosive characteristics, there is a lot of engineering examples used polyester ropes as mooring lines in deep-water FPSO all over the world Polyester rope has viscoelastic properties determine the axial stiffness of nonlinear characteristics in the practical engineering applications. The polynomial approximation of nonlinearity method for polyester rope is applied in the dynamic coupled simulation. The dynamics of a turret-moored FPSO with 12 catenary polyester mooring lines are studied to investigate the influence of the hull/mooring coupled system from both linear and nonlinear stiffness of polyester line in the wind, wave and current environment. The results＇ are compared through the dynamic response of FPSO and mooring line tension. These results indicate that the nonlinear elastic method should be used in engineering works to decrease the damaged risk of the structure.

关 键 词：深水系泊系统 聚酯缆 非线性刚度 FPSO 耦合 

分 类 号：U674.381[交通运输工程—船舶及航道工程]