EXPERIMENTAL RESEARCH RELATIVE TO IMPROVING THE HYDRODYNAMIC PERFORMANCE OF OCEAN GOING TUG/BARGE SYSTEMS: PART B, SEAWORTHINESS EXPERIMENTS (CONCEPT III)

This report presents the results of seaworthiness experiments and undocking maneuvers conducted with the concept III tug/barge design. This concept is quite similar to the concept II design in that the same barge and pin location was used and relative pitch freedom was permitted. Some of the more important results of the investigation are: (a) The Concept III forces and moments are larger than those for Concept II, with the vertical and transverse forces showing the largest increase. (b) The Concept III relative pitch, tub pitch and tug/barge roll motions are larger than those of Concept II. (c) Optimum undocking of the tug was only accomplished when the pins were retracted at a point of minimum motion and force, followed by prompt backing of the tug before considerable motion could develop.

• Supplemental Notes:
  • Four Volume Set available from NTIS as PB-263535; PC $12.50.
• Corporate Authors:

  David Taylor Naval Ship R&D Center

  Bethesda, MD  United States  20084
• Authors:
  • Rossignol, G A
  • Woo, E L
• Publication Date: 1975-4

Media Info

• Pagination: 43 p.

Subject/Index Terms

• TRT Terms: Backing (Driving); Barges; Driving; Maneuvering; Ocean going tugs; Seaworthiness; Ship motion; Tug ship interaction; Tugboats
• Old TRIS Terms: Tug barge linkage; Tug barge systems
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00149330
• Record Type: Publication
• Source Agency: Maritime Administration
• Report/Paper Numbers: MA-RD-940-77052 Final Rpt.
• Contract Numbers: 400-28003
• Files: TRIS, USDOT
• Created Date: Apr 13 1977 12:00AM