Ship Rolling, Its Prediction and Reduction Using Roll Stabilization

Abstract

This paper is designed to provide the ship designer with a description of the phenomenon of ship rolling, its prediction using available theoretical methods, and its reduction using available roll stabilization systems. A critical review of a number of available, predictive methods is provided. It is concluded that roll motions without stabilizers can be satisfactorily predicted using available methods and that it is necessary, in predicting rolling motions, to consider coupled roll-sway motions. The use of passive and active antiroll tanks and active fin stabilizers is discussed, and the size, performance, advantages, and disadvantages of each type are considered. Finally, the need for model tests to validate predicted roll stabilizer performance and the need for additional research in the area of roll motions are considered.