선박형상이 부가저항에 미치는 영향에 관한 연구

Abstract

In this study, the effects of hull form on added resistance are studied by experimental and numerical methods. Particularly, two KVLCC2 hull forms are considered: the original hull form and a modified with Ax-bow. The both hulls have the same shape below still-water level, but the difference is in the shape of bow above still-water level. In experiment, captive model tests are performed for the two hull forms. Added resistance is evaluated by subtracting the still-water resistance from the mean resistance in waves. In numerical analysis, three different seakeeping analyses are adopted: strip method, Rankine panel method with linear and nonlinear approaches, and a Cartesian grid method. In this study, numerical difficulties for the evaluation of added resistance induced by the Ax-bow existing above the mean water level are observed. The experimental and numerical results of motion response and added resistance are compared and the effects of hull form on added resistance are discussed.me shape below still-water level, but the difference is in the shape of bow above still-water level. In experiment, captive model tests are performed for the two hull forms. Added resistance is evaluated by subtracting the still-water resistance from the mean resistance in waves. In numerical analysis, three different seakeeping analyses are adopted: strip method, Rankine panel method with linear and nonlinear approaches, and a Cartesian grid method. In this study, numerical difficulties for the evaluation of added resistance induced by the Ax-bow existing above the mean water level are observed. The experimental and numerical results of motion response and added resistance are compared and the effects of hull form on added resistance are discussed.