The impact of nonlinear elastic cable on the performance of mooring system

With the enlarging of ship scale,diversification of offshore platform and increasing of water depth,the composition of mooring line is developing toward diversification from single component at the early stage of the design,and at the same time,diversified types of mooring line material provide more choices for the mooring design.In this paper numerical simulation analysis is conducted on the mooring line added into non-linear elastic stretch material,using the piecewise extrapolating-correction method.The influence of non-linear elastic stretch materials on the mooring system performance such as deformation,tension and rigidity is analyzed under the same water depth.And the application in the situation of different water depths is further studied.The results show that,non-linear elastic stretching of the material can effectively reduce the tension of mooring line and its stiffness,in addition,the research indicated that this kind of material combined with mooring system is more suitable for shallow water.