深水二维对称式布置两成分锚泊线时域动力分析

深水作业海上浮式结构物的锚泊定位系统由锚链或锚索等成分进行约束,由于锚泊线的几何非线性,外界环境作用力的非线性和系泊浮体的运动的非线性给锚泊系统的回复力和位移的计算分析带来困难。此外,多种材料成分组成的多成分锚泊线的使用在推动了锚泊系统的深水应用和发展的同时也给锚泊系统的设计带来困难。本文采用设计波理论结合有限元方法进行两成分锚泊线的动力分析,考虑导缆孔处系泊结构物运动的影响。并将结果与单一成分锚泊线计算结果作比较分析,得到有益结论。

Dynamics of Two-components Mooring Line in Deep Water

The offshore floating structures in deep water are usually moored by multi-component cables or chains.The restoring force is induced by the nonlinear effect of environment loads,the motion of the floating structure as well as the geometry of mooring lines.The mooring lines made from different materials push the multi-component mooring system into the deeper water while bring a big challenge to the design work with the dynamic computation.A method for the dynamics analysis is put forward,which combined the finite element method and the design wave theory including the effect of the motion of the moored structure at the fairlead point.The computation results of different segments are compared while the results from the two-component mooring line are also compared with the single component one.