ON THE INTERFERENCE BETWEEN BOW-GENERATED WAVES AND LONG SLENDER SHIP AT LOW FROUDE-NUMBER

When the waves generated in bow region travel along a long slender-body, they meet deformation at the middle body region. This phenomenon is difficult to explain by the classical wave-making theory. So far, the deformation of ship waves has been observed by many researchers, and this is known as the sheltering effect of the body. In this paper an attempt for analyzing the ship wave deformation is made under the assumption that the wave number (ratio of gravitational effect to dynamical effect) is such that the waves generated by the bow are of the same order as the beam of ship. The problem is solved by the method of matched asymptotic expansions using slender-body theory. Incidentally, it becomes clear that as far as the diffraction of ship waves near a slender-body is concerned, there are no differences between steady and unsteady ship motions. This is true under the condition that wave length is of the same order as the beam. So, the near-field problem coincides with that of Faltinsen. The result obtained here can explain qualitatively the phenomena which have been discovered in the experiments on an extremely slender-body.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/05148499
• Corporate Authors:

  Society of Naval Architects of Japan

  23 Shiba-kotohiracho, Minato-ku
  Tokyo 135,   Japan 

  Society of Naval Architects of Japan

  15-16, Toranomon, 1-chome, Minato-ku
  Tokyo,   Japan 
• Authors:
  • Adachi, H
• Publication Date: 1974-6

Language

• Japanese

Media Info

• Features: References;
• Pagination: p. 39-52
• Serial:
  • Journal of the Society of Naval Architects of Japan
  • Volume: 135
  • ISSN: 0514-8499

Subject/Index Terms

• TRT Terms: Froude number; Ships; Thinness; Wave resistance
• Old TRIS Terms: Effects; Slender bodies; Thin ship theory
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00071544
• Record Type: Publication
• Source Agency: Society of Naval Architects of Japan
• Files: TRIS
• Created Date: Nov 12 1974 12:00AM