STUDY OF PROPELLER BLADE STRESSES AND BEARING FORCES ON A HIGH-SPEED TWIN-SCREW CONTAINER SHIP (1ST REPORT: STATISTICAL STRESS)

On the larger and higher-powered ships, wide-bladed propellers and multiple shafts have come into use to counter cavitation-erosion caused by increased propeller loads, and shaft alignment, including that in the tail-shaft bearings in the bossings, has become an important design consideration. To evaluate the propeller bearing forces, the Ship Research Institute of Japan has developed a computer program using non-steady lifting-surface propeller theory. Results from the program have shown good agreement with force measurements in model tests, but have not been verified on operating full-scale propellers. It is hardly possible to measure the propeller bearing forces directly, but the computer program enables the forces to be checked by measuring the bending stresses on a full-scale propeller-blade. In this 1st Report, the Authors present a statical stress analysis for a propeller blade in an 80,000-shp twin-screw container-ship, together with stress measurements obtained from a 1/4-scale propeller. In a 2nd Report, these data will be compared with full-scale measurements of fluctuating blade-stresses.

• 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 
• Authors:
  • OKAMOTO, H
  • Nozawa, K
  • Umakoshi, T
• Publication Date: 1976-6

Language

• Japanese

Media Info

• Features: References;
• Pagination: 13 p.
• Serial:
  • Journal of the Society of Naval Architects of Japan
  • Volume: 129
  • ISSN: 0514-8499

Subject/Index Terms

• TRT Terms: Blades (Machinery); Containerships; Propeller blades; Propeller shafts; Propellers; Shaft bearings; Stresses; Structural analysis
• Old TRIS Terms: Blade stresses; Propeller shaft stresses; Propeller stresses; Twin screws
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00152336
• Record Type: Publication
• Source Agency: British Ship Research Association
• Files: TRIS
• Created Date: Apr 27 1977 12:00AM