Recovering the functional form of the nonlinear roll damping of ships from a free-roll decay experiment: An inverse formulism |
| |
Authors: | TS Jang SH Kwon JH Lee |
| |
Institution: | Department of Naval Architecture and Ocean Engineering, Pusan National University, Pusan 609-735, South Korea |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|