A stability analysis of the roll motion of a ship in an irregular seaway

Article type: Research Article

Authors: Price, W.G.

Affiliations: Department of Mechanical Engineering, University College London

Abstract: The restoring moment coefficient in the differential equation describing the roll motion of a ship is assumed time dependent – being either sinusoidal or random inform. For a sinusoidal coefficient the motion equation reduces to the Mathieu type and the stability of motion discussed. For a ship in an irregular seaway, the coefficient will be a random time dependent function. The concepts of stability from a probabilistic viewpoint are defined and a method summarised how the stability of motion in this situation may be investigated.

DOI: 10.3233/ISP-1975-2224702

Journal: International Shipbuilding Progress, vol. 22, no. 247, pp. 103-112, 1975