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Establishing uncertainty analysis procedures for inaccuracies in operational ship stability

Enshaei, H ORCID: 0000-0002-5649-7015, Woodward, MD ORCID: 0000-0003-3622-9459, Uge, C and Kianejad, S 2021 , 'Establishing uncertainty analysis procedures for inaccuracies in operational ship stability', paper presented at the Stability & Safety (STAB&S) 2021: 1st International Conference on the Stability and Safety of Ships and Ocean Vehicles, 7-11 June 2021, Glasgow.

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Abstract

The ship stability is essentially assessed for all ships before, after and during the operation. The purpose of assessing ship stability is to ensure the ability of ship to float and return to an upright position if inclined under the action of an external force. Ship stability, as with other critical parameters relating to ship operations, is of paramount importance and should therefore be dealt with accordingly with an appropriate uncertainty analysis. Uncertainty analysis is commonly utilised in a design to establish the uncertainty in result as a function of the input variable. This can in turn be utilised to establish an interval about the result that may be expected to encompass a large fraction of the distribution of values that could reasonably be attributed to the measurement. This paper provides a methodology for calculating a confidence interval for the centre of mass of a ship in operation and ultimately, in any load condition. The uncertainty for a sample containership was carried out by considering the effect of weights on the centre of gravity of the ship. It appears that variation in height of cargo in containers can change the

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Enshaei, H and Woodward, MD and Uge, C and Kianejad, S
Keywords: ship stability, uncertainty analysis, ship operation, ship centre of gravity
Journal or Publication Title: Proceedings of the 1st International Conference on the Stability and Safety of Ships and Ocean Vehicles
Publisher: STAB&S 2021
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