An oil outflow model for tanker collisions and groundings |
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Authors: | Giel van de Wiel J René van Dorp |
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Institution: | (1) Ship Design Laboratory, School of Naval Architecture and Marine Engineering, National Technical University of Athens, Athens, Greece;(2) Germanischer Lloyd AG, Hamburg, Germany |
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Abstract: | In this paper we have developed an oil outflow model for collision and grounding accidents of tankers. The collision model
explicitly links input variables such as tanker hull design (single or double), displacement and speed, striking vessel displacement
and speed, and the interaction angle of both vessels to output variables: longitudinal and transversal damage extents of the
tanker. Overlaying these damage extents on the tank vessel’s design yields an oil outflow volume totaling the capacity of
the damaged tank compartments. A similar model is developed for grounding accidents. A total of 80,000 simulation accident
scenarios described in the National Research Council SR259 report published in 2001 served as the joint data set of input
and output variables used in this “linking” process. The oil outflow model herein was designed keeping computational efficiency
in mind to allow for its integration with a maritime transportation system (MTS) simulation. We shall demonstrate the use
of the oil outflow model as a final analysis layer to evaluate double-hull effectiveness in a geographic context of an MTS
simulation model developed for the oil transportation routes traversing the environmentally sensitive San Juan Islands area
in Washington State. |
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