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Practical squat assessment for a ship manoeuvring in muddy environments
https://orcid.org/0000-0003-4109-3330
https://orcid.org/0000-0002-1165-7644
Highlights Investigation of the squat of a container ship in muddy navigation areas. Discussion of the effect of a drift angle on the squat behaviour of a ship. An elaborated 6 DOF manoeuvring model is used to extract a correction rule to existing squat formulae that neglect mud.
Abstract The condition of the bottom is practically never assessed in squat prediction formulae, but plays an important role in the magnitude of the squat prediction, as is shown in the present paper. Based on a comprehensive dataset of historical towing tank tests, a comprehensive 6 DOF manoeuvring model has been derived, which is used as a basis to derive a practical correction term which can be applied to common empirical squat prediction formulae to account for the presence of a muddy bottom. It seems that in normal sailing conditions, with small drift angles, a minor increase of the maximal sinkage prediction is needed when it is not desired to touch the mud layer with the ship.
Practical squat assessment for a ship manoeuvring in muddy environments
https://orcid.org/0000-0003-4109-3330
https://orcid.org/0000-0002-1165-7644
Highlights Investigation of the squat of a container ship in muddy navigation areas. Discussion of the effect of a drift angle on the squat behaviour of a ship. An elaborated 6 DOF manoeuvring model is used to extract a correction rule to existing squat formulae that neglect mud.
Abstract The condition of the bottom is practically never assessed in squat prediction formulae, but plays an important role in the magnitude of the squat prediction, as is shown in the present paper. Based on a comprehensive dataset of historical towing tank tests, a comprehensive 6 DOF manoeuvring model has been derived, which is used as a basis to derive a practical correction term which can be applied to common empirical squat prediction formulae to account for the presence of a muddy bottom. It seems that in normal sailing conditions, with small drift angles, a minor increase of the maximal sinkage prediction is needed when it is not desired to touch the mud layer with the ship.
Practical squat assessment for a ship manoeuvring in muddy environments
https://orcid.org/0000-0003-4109-3330
https://orcid.org/0000-0002-1165-7644
Highlights Investigation of the squat of a container ship in muddy navigation areas. Discussion of the effect of a drift angle on the squat behaviour of a ship. An elaborated 6 DOF manoeuvring model is used to extract a correction rule to existing squat formulae that neglect mud.
Abstract The condition of the bottom is practically never assessed in squat prediction formulae, but plays an important role in the magnitude of the squat prediction, as is shown in the present paper. Based on a comprehensive dataset of historical towing tank tests, a comprehensive 6 DOF manoeuvring model has been derived, which is used as a basis to derive a practical correction term which can be applied to common empirical squat prediction formulae to account for the presence of a muddy bottom. It seems that in normal sailing conditions, with small drift angles, a minor increase of the maximal sinkage prediction is needed when it is not desired to touch the mud layer with the ship.
Practical squat assessment for a ship manoeuvring in muddy environments
Delefortrie, Guillaume (author) / Sotelo, Marco (author) / Boucetta, Djahida (author)
Applied Ocean Research ; 123
2022-04-12
Article (Journal)
Electronic Resource
English
Sinkage , Trim , Nautical bottom , Prediction
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