WAVE DIFFRACTION BY ADVANCING SLENDER SHIPS

Authors
  1. Ando, S.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The diffraction of regular waves by advancing slender ships is investigated theoretically and expeirmentally. In the theoretical model, the physical domain with the actual free surface is transformed by a mapping into a computational domain in which the linearized diffraction problem is solved by slender-body theory and the method of matached asymptotic expansions. Compraed with the "conventional" formulation, this approach results in improved agreement with experiment at high forward speeds. In particular, the strongly nonlienar relationship between ship speed and wave-induced pressure, which is an unexpected feature observed in experiments but non-existent in the prediction by the conventional formulation, is predicted properly by this approach. But, like the conventional theory, the present formulation tends to underestimate the wave-indeed pressure on the forebody. The basic scheme in the present formulation can be incorportaed tino the any solution method for the wave diffraction problem for ships for any heading to improve the predictions for speeds higher than Froude number of about.
Date of publication
11 Aug 1993
Number of Pages
8
DSTKIM No
94-00541
CANDIS No
137876
Format(s):
Hardcopy;Originator's fiche received by DSIS

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