CALCULATION AND COMPARISON OF PROPELLER UNSTEADY PRESSURE FORCES ON SHIPS

A formula previously developed for calculating propeller-induced vibratory hull surface forces is reorganized for improved computational efficiency. The reorganized formula is simplified to several alternative forms which are more readily usable by the designer. Specifically, for non-cavitating conditions, a simple relation is derived by which the vertical hull surface force can be estimated if the propeller bearing forces are known. Data which pertains to the stern surface shape is required in the formula; this data for sterns representing the two characteristically different types is included in the paper. Two simplified formulas for estimation of hull surface forces associated with cavitation are also derived. The accuracy of the several simplified formula proposed is judged on the basis of more rigorous computations performed on four different ships.

  • Supplemental Notes:
    • Presented at the Ship Vibration Symposium sponsored by The Ship Structure Committee and The Society of Naval Architects and Marine Engineers, Arlington, Virginia, October 16-17, 1978.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Vorus, W S
    • Breslin, J P
    • Tein, Y S
  • Publication Date: 1978

Media Info

  • Pagination: 27 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00183164
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Oct 31 1978 12:00AM