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Evaluation of finite element analysis as a tool to predict sea loads with the aid of trials data.


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Amin, W, Davis, M and Thomas, GA 2008 , 'Evaluation of finite element analysis as a tool to predict sea loads with the aid of trials data.', paper presented at the High Speed Marine Vehicles, HSMV 2008, 21-23 May, Naples, Italy.

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The current study evaluates the using of finite element modelling as a tool to predict sea loads for high-speed wave
piercing catamarans based on sea trials data. The current sea trials data is for HSV-2 Swift; a 98 meter Incat Seaframe
designed by Revolution Design and configured to U.S. Navy specification. The ship was instrumented with a system of
sensors and data acquisition system to monitor structural response, ship motions, performance, and sea conditions. A
detailed finite element model of a similar vessel was modified to represent the existing ship configuration. A new
methodology is presented to investigate sea loads during trials, and the results from the FE analysis are compared to
trials data. It was found that a direct comparison of strain time histories of trial and finite element analysis, was hard to
achieve. However, the FE RMS strains are in good agreement with trials RMS strains and approached a correlation
coefficient of 95.5% for perfect heads seas condition and 80.2% for head seas with a slight loading asymmetry.

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Amin, W and Davis, M and Thomas, GA
Keywords: High speed catamarans-wave loads-finite elemet analysis-structural analysis-wave loads modelling- sea trials
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