Research on the Rolling Motion and Pitch Motion of Planing Boat

Abstract

Abstract. In this paper, a planing boat has been selected as the research object, which has been used as a model to make a new model by scaling. And the free decay experiments have been conducted under different states including different rolling angle, different pitching angle and different ship's draft, whose corresponding mathematical models have been established according to the characteristics of the planing boat. A identification system using optimization concept has been used to identify the experimental data, which finally obtained the variation law of hydrodynamic derivatives. And the hydrodynamic coefficients related have been obtained by the later analyzing the data. The results and the methods of studying the planing boat can provide basis for the improvement in the navigating performance of the planing boat.