Effects of the angle-dependent damping on the rolling motion of ships in regular beam seas¹

Article type: Research Article

Authors: Cardo, A.^a | Ceschia, M.^b | Francescutto, A.^b | Nabergoj, R.^b

Affiliations: [a] The Institute of Naval Architecture, Trieste University, Trieste, Italy | [b] The Institute of Physics, Trieste University, Trieste, Italy

Note: [1] This work was supported by CNR under Contribution CT 78.00692.07.

Abstract: An examination of the influence of the damping effects on the ship-rolling motion in regular beam seas has been made. The assumed damping includes both the linear and quadratic contributions, where, in particular, for the linear term a given dependence on the heeling angle is taken. An approximate analytical solution in the resonance region was determined by a perturbation method and compared with a computer solution. The results showed that the maximum rolling amplitude attainable for a given excitation is markedly affected by the angle-dependent part which was introduced in the linear damping term.

DOI: 10.3233/ISP-1980-2731001

Journal: International Shipbuilding Progress, vol. 27, no. 310, pp. 135-138, 1980