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http://dx.doi.org/10.7837/kosomes.2017.23.7.933

Estimating Hydrodynamic Coefficients with Various Trim and Draught Conditions  

Kim, Daewon (Graduate school, Faculty of Mechanical Engineering and Marine Technology, University of Rostock)
Benedict, Knud (ISSIMS Institute, Hochschule Wismar, University of Applied Sciences, Technology, Business and Design)
Paschen, Mathias (Faculty of Mechanical Engineering and Marine Technology, University of Rostock)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.23, no.7, 2017 , pp. 933-940 More about this Journal
Abstract
Draught and trim conditions are highly related to the loading condition of a vessel and are important factors in predicting ship manoeuverability. This paper estimates hydrodynamic coefficients from sea trial measurements with three different trim and draught conditions. A mathematical optimization method for system identification was applied to estimate the forces and moment acting on the hull. Also, fast time simulation software based on the Rheinmetall Defense model was applied to the whole estimation process, and a 4,500 Twenty-foot Equivalent Unit (TEU) class container carrier was chosen to collect sets of measurement data. Simulation results using both optimized coefficients and newly-calculated coefficients for validation agreed well with benchmark data. The results show mathematical optimization using sea measurement data enables hydrodynamic coefficients to be estimated more simply.
Keywords
Ship manoeuvrability; System identification method; Hydrodynamic coefficients; Sea trial; Mathematical optimization;
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