|Lateral forces on ships in steady motion parallel to banks or beaches|
King, G.W.; Tuck, E.O. (1979). Lateral forces on ships in steady motion parallel to banks or beaches. Appl. Ocean Res. 1(2): 89-98
In: Applied Ocean Research. C.M.L. Publications: Southampton (125 High St., Southampton SO1 0AA). ISSN 0141-1187, more
Banks (topography); Beaches; Forces; Manoeuvrability; Shallow water; Ship motion; Ships
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The Authors, of the University of Adelaide, present a mathematical formulation for the motion of a slender ship in shallow water parallel to straight bottom contours, and derive from this a singular integral equation which determines the vorticity on the ship, together with a numerical procedure for solving this equation. Particular attention is paid to the trailing edge of the ship, to ensure that a correct solution of the equation is found. Numerical results for the cases of a bank and of a uniformly-sloping beach are provided. The effect of changing a ship's waterplane shape, and the effects of changes in local water-depth, distance to the beach or bank, beach angle, and ship's yaw are all investigated. The article provides a technique which can be used to find the effect of different bottom topographies on the motion of a ship. It shows that the results obtained from a bank suction investigation cannot always be readily used to predict the effect of another bottom topography, and that care must be taken when trying to formulate general conclusions.