Unfavourable environmental conditions associated with an insufficient stability margin adopted in the design process may determine ship capsizing. One of the most critical situations is generated when the ship moves on longitudinal waves, at parametric resonance condition. In this paper, the theoretical and experimental investigations on transverse stability of a cargo ship on regular longitudinal waves are considered. During the seakeeping model tests on longitudinal waves, the occurrence of induced roll motions were observed and measured. The restoring moment on longitudinal waves was determined based on theoretical and experimental methods. A computer code has been implemented in order to calculate the main parts of the restoring moment i.e. Froude-Krylov, diffraction and radiation components. In order to reproduce the real physical phenomenon, captive and semi-captive model tests were correlated. The radiation and diffraction forces and moments and the restoring moment on regular longitudinal waves were measured. The agreement of the calculated solutions with the experimental results indicates the possibility of using the adopted hydrodynamic model in the design process.
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ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering
June 15–20, 2008
Estoril, Portugal
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4821-0
PROCEEDINGS PAPER
Transverse Stability of a Cargo Ship at Parametric Rolling on Longitudinal Waves Available to Purchase
Dan C. Obreja,
Dan C. Obreja
University “Dunarea de Jos” of Galati, Galati, Romania
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Radoslav Nabergoj,
Radoslav Nabergoj
University of Trieste, Trieste, Italy
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Liviu I. Crudu,
Liviu I. Crudu
University “Dunarea de Jos” of Galati, Galati, Romania
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Sandita Pacuraru-Popoiu
Sandita Pacuraru-Popoiu
University “Dunarea de Jos” of Galati, Galati, Romania
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Dan C. Obreja
University “Dunarea de Jos” of Galati, Galati, Romania
Radoslav Nabergoj
University of Trieste, Trieste, Italy
Liviu I. Crudu
University “Dunarea de Jos” of Galati, Galati, Romania
Sandita Pacuraru-Popoiu
University “Dunarea de Jos” of Galati, Galati, Romania
Paper No:
OMAE2008-57768, pp. 579-587; 9 pages
Published Online:
July 27, 2009
Citation
Obreja, DC, Nabergoj, R, Crudu, LI, & Pacuraru-Popoiu, S. "Transverse Stability of a Cargo Ship at Parametric Rolling on Longitudinal Waves." Proceedings of the ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. Volume 4: Ocean Engineering; Offshore Renewable Energy. Estoril, Portugal. June 15–20, 2008. pp. 579-587. ASME. https://doi.org/10.1115/OMAE2008-57768
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