单点锚泊船锚链线水平摄动分析

为研究单点锚泊船在外力作用下的低频运动锚链线的恢复性能的问题,利用锚链线的静力特性推导出锚泊线方程,考虑水深、水平位移、单位锚链重与水平作用的关系,同时通过水平作用力与顶端水平位移进行参数摄动分析,以偏微分的方法推导了锚泊线恢复性能系数方程,并结合水平力参数摄动法分析锚泊线的恢复作用性能。计算结果验证了恢复系数具有明显的非线性,所得恢复性能方程及摄动分析结论对工程实践及锚泊(防走锚)预警系统的理论研究具有一定的参考意义。

Level disturbance Analysis of the Single Point Mooring line

In order to study the recovery capability for mooring line of the Single Point Mooring ship under the condition of low-frequency motion, the mooring line equation was deduced by static characteristic of the mooring line, and by taking the relationship between the water depth, horizontal displacement, unit weight and horizontal force into consideration. At the same time, the definition of the differential equation of mooring line recovery coefficient was obtained from the analysis on the horizontal forces and top horizontal displacement of the parameter perturbation, and the research of recovery capability of anchor chain was conducted by the method of the horizontal force parameter perturbation. From the calculation, the conclusion was drawn that recovery coefficient was obviously nonlinear, which has certain reference significance for engineering practice and anchoring alarm system.