Experimental Research on the Characteristics of Nonlinear Roll Hydrodynamic Coefficients of a Composite Trimaran

摘要

The rolling motion behaviour of a composite trimaran was studied in the Jiangsu University of Science and Technology Ship hydrodynamic Centre. The mathematical model of rolling motion is established considering both linear and nonlinear ship motion. The overall seakeeping behaviour of the vessel is discussed and particular attention is paid to the roll motion. The results of time-domain nonlinear hydrodynamic identification are validated against the model tests and the relative error is less than 3%. Parametric roll is discussed and test results are presented. The nonlinear effect on the roll motions of the draft, spacing and attitude of side hulls is evaluated. The paper ends with a discussion on configurations of side hull for composite trimaran vessels. This paper can provide technical support in the optimization design of composite trimaran and the research of composite multi-hull ship.