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Publications
Zhou, X., Sutulo, S. and Guedes Soares, C. (2010), “Computation of Ship-to-Ship Interaction Forces by a 3D Potential Flow Panel Method in Finite Water Depth”, Proceedings of the 29th International Conference on Ocean, Offshore and Arctic Engineering (OMAE´10), 6-11 June, 2010, Shanghai, China, ASME, New York, Paper OMAE2010-20497
The double-body 3D potential flow code developed earlier for computing hydrodynamic interaction forces and moments acting on the hulls of the ships sailing in close proximity with neighbouring ships or some other obstacles, was extended to the shallow water case. Two methods for accounting for the finite water depth were implemented: use of truncated mirror image series, and distribution of an additional single layer on parts of the seabed beneath the moving hulls. While the first method does only apply to the flat horizontal seabed, the second one can also deal with the arbitrary bathymetry situations. As appropriate choice of the discretization parameters can significantly affect the accuracy and efficiency of the second method, the present contribution focuses on comparative computations aiming at defining reasonable dimensions of the moving paneled area on the sea bottom and maximum admissible size of the bottom panel. Comparisons were carried out for an isolated ship’s added masses and for the interaction forces in kinematic simulation of an overtaking manoeuvre. Conclusions concerning optimal parameters of the additional set of panels are drawn.
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