HYDRODYNAMIC INTERACTIONS BETWEEN SHIPS IN SHALLOW WATER

This thesis concerns the hydrodynamic interactions between ships moving at the same speed along parallel paths in shallow water. The ships are assumed to be slender and moving in an ideal fluid. Lateral separation between the ships is assumed small. First, the problem with the rigid free-surface approximation is considered. The method of "Matched Asymptotic Expansion" is used to obtain a solution. Then a similar procedure is applied to include effects of free surface. It is found that to the lowest order, free-surface effects do not affect the sway force and yaw moment, although it has an influence on the sinkage and trim of the vessels. Theoretical results are compared with experimental data. Overall satisfactory agreement is observed especially when the vessels are in abreast configuration. Theoretical yaw moment prediction is generally not as good as sway force.

• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Ocean Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • Hwang, W Y
• Publication Date: 1976-9

Subject/Index Terms

• TRT Terms: Hydrodynamic pressure; Maneuvering; Ship motion; Thinness; Yaw; Yaw
• Old TRIS Terms: Hydrodynamic forces; Restricted water operation; Shallow water maneuvering; Ship interaction; Slender bodies
• Subject Areas: Marine Transportation; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

• Accession Number: 00142342
• Record Type: Publication
• Source Agency: Massachusetts Institute of Technology
• Report/Paper Numbers: MS Thesis
• Files: TRIS
• Created Date: Nov 23 1976 12:00AM