Recovering the functional form of the nonlinear roll damping of ships from a free-roll decay experiment: An inverse formulism
Recovering the functional form of the nonlinear roll damping of ships from a free-roll decay experiment: An inverse formulism
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DOI：
10.1016/j.oceaneng.2010.06.012
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发表时间：
2010-10
影响因子：
5
通讯作者：
T. Jang;S. Kwon;Jin Lee
中科院分区：
文献类型：
--
作者：
T. Jang;S. Kwon;Jin Lee
本文的目的是在实验的基础上，识别特定船舶的非线性横摇阻尼的函数形式。阻尼识别的问题被制定为第一类积分方程。然而，由于第一类积分方程的不适定性，问题的解缺乏稳定性。为了解决这个问题，稳定化技术（称为正则化方法）被施加到本问题的非线性阻尼的识别。非线性横摇阻尼的识别结果与传统的横摇识别方法进行了比较。本研究的结果进行了验证的直接比较自由滚衰减运动的实验数据与数值模拟结果。
The purpose of this paper is to identify the functional form of the nonlinear roll damping for a particular ship based on an experiment. The problem of damping identification is formulated as an integral equation of the first kind. However, the solution of the problem lacks stability properties, due to the ill-posedness of the first-kind integral equation. To resolve this problem, a stabilization technique (known as a regularization method) is applied to the present problem of the identification of nonlinear damping. The identified results for nonlinear roll dampings are compared with those from a conventional roll identification method. The findings of the present study are validated by the direct comparison of experimental data on free-roll decay motion with the numerically simulated results.