A Study to improve the computer program for ship maneuvering motion simulation
Date Issued
2010
Date
2010
Author(s)
Lee, Pei-Jung
Abstract
A computer program to simulate ship maneuvering motions in deep water was developed at the Motion & Control Lab. of ESOE, NTU in 1988, basing on the MMG (Mathematical Modeling Group) model developed in Japan. In the present study, to update the ship maneuvering motion simulation program, recently developed empirical formula for estimating hydrodynamic coefficients by Kijima are adopted and included into the computer program. Sea trial data including turning tests and zig-zag maneuvers of 9 ships offered by USDDC and 3 ships offered by CSBC are used for comparing with the simulation results obtained by the updated computer program. It is confirmed that the empirical formula for estimating linear and nonlinear damping coefficients proposed by Kijima in 2006 improved significantly the accuracy of simulated maneuvering motions. In addition, the empirical formula for estimating the hydrodynamic coefficients of fat ships proposed by Kijima in 2009 are also included in the updated program, although the validation has not been conducted due to the lack of sea trial data of fat ships that meet the definition. Furthermore, the regression formula for estimating the added mass and added moment of inertia proposed by Mori in 1996, as well as the empirical formula for estimating wind force coefficients proposed by Fujihara in 2005, are also included in the updated computer program for ship maneuvering motions simulation.
Subjects
ship maneuvering
Type
thesis
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