A Study on Roll Stabilizers for Ships

Phan anh Tuan, Kuniaki Shoji, Kiyokazu Minami, and Shigeo Mita

Abstract:	A view of development of roll stabilizers is shown in this paper. A passive anti-rolling tank (ART) is designed and tested to investigate the damping effect on ship’s roll motion. This ART consists of two fixed reservoirs and a set of three connected ducts. Experiments were carried out in towing tank of Tokyo University of Marine Science and Technology. To estimate roll damping coefficient of the model ship, several serials of experiments have been conducted. In with, some of them were conducted by testing roll motion of the model ship without using ART and the others of them were conducted by testing roll motion of the model ship with using ART. Experiments that used ART were tested in two types. First type is tested with constant wave height and the second type is tested with constant wave slope. Wave height of experiments are 40 mm, 60 mm, 80 mm and wave slope of experiments (H/L) are 1/25, 1/35, 1/45. Experiments were conducted in regular sinusoidal waves with small amplitude. Frequency of experiments is a range from 0.5 Hz to 1.2 Hz. Some graphs that show the effect of ART to roll motion of the model ship are drawn. The influence of ART on roll motion of the model ship is compared in theory and in experiment. Research shows that when the model ship using ART, the magnitude of roll motion is reduced up to thirty percent. Keywords: Anti-rolling Tank, Damping Coefficient, Roll Motion, Wave Height, Wave Slope
Published in:	Proceedings of the 2008 National Technical Meeting of The Institute of Navigation January 28 - 30, 2008 The Catamaran Resort Hotel San Diego, CA
Pages:	973 - 979
Cite this article:	Tuan, Phan anh, Shoji, Kuniaki, Minami, Kiyokazu, Mita, Shigeo, "A Study on Roll Stabilizers for Ships," Proceedings of the 2008 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2008, pp. 973-979.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In