锚泊线的动力分析

本文应用频率域方法，研究波频运动引起低频慢荡阻尼力问题中锚泊线所引起的力。锚泊线所引起的阻尼，在本质上与其和运动间的初相位角有关。该相位信息需从频域分析得出。本文应用摄动理论推导了到二阶的锚泊线张力响应函数。算例以及与相应的时域的结果比较，可以看出应用频域摄动分析的结果在假设适用范围内与时域得到的结果基本相符。

THE ANALYSIS OF MOORING LINE DYNAMICS

The mooring line dynamic response was analyzed by both time domain calculation and frequency domain analysis methods. The tension time trace of a mooring line under the excitation of the up end surge random motion was analyzed by an existing program. The first and second order frequency response functions obtained were compared with the corresponding theoretical ones. The comparison shows that they are in general coincident, but some deviations remain. The reason of such deviation was discussed. Also some conclusions were drawn.