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Publications
Abdelwahab, H.S. and Guedes Soares, C. (2024), Multivariable operability and downtime assessment of a tanker moored at an upgraded oil terminal in Leixões port, Advances in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis Group, London, UK¸ pp. 89-101.
This paper examines the operability and downtime of a moored tanker at an upgraded berth within the port of Leixões, Portugal, employing multivariable experimental measurements. A physical model replicating the modified port layout, new bathymetry, and a planned 300 m north breakwater extension, is constructed. The tanker undergoes testing under various outer-port sea states and two mooring configurations. Two methodologies are utilized to accurately characterise and evaluate the operability and downtime of the berthed tanker: mono-parametric thresholding and conditioned thresholding at various predefined minimal operational windows. The study proposes a new comprehensive clustered operability scheme that integrates in-port and outer-port wave records, motions, and mooring loads, where the exceedance of standard operational and safety criteria indicates the potential mooring hazards, operability issues, and delays. The results highlight the effectiveness of the conditioned thresholding approach in addressing a broader range of variables and their interrelationships compared to the mono-parametric thresholding approach.
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