|Hydrodynamic interactions of ships with fixed obstacles|
Yeung, R.W.; Tan, W.T. (1980). Hydrodynamic interactions of ships with fixed obstacles. J. Ship Res. 24(1): 50-59
In: Journal of Ship Research. Society of Naval Architects and Marine Engineers: New York,. ISSN 0022-4502, more
Forces; Hydrodynamics; Manoeuvrability; Navigation; Pressure; Shallow water; Ships
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The hydrodynamic interactions of a slow-moving vessel with a shoreline or an obstacle in shallow water are investigated using slender-body theory. With the assumption that the free surface is rigid, the problem is shown to be equivalent to studying the flow about a porous airfoil moving near an irregular boundary in the horizontal plane. A numerical procedure is developed based on the availability of an "obstacle Green function." Theoretical results indicate that the vessel experiences an attractive force and a bow-in moment during the approach toward a wedge-shaped obstacle, such as a pier or a breakwater, regardless of the angle of approach. For a vessel approaching a side bank at an angle, the theory yields results consistent with the so-called "bank-rejection" phenomenon.