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.
- 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.
Society of Naval Architects and Marine Engineers601 Pavonia Avenue
Jersey City, NJ USA 07306-2907
- Vorus, W S
- Breslin, J P
- Tein, Y S
- Publication Date: 1978
- Pagination: 27 p.
- TRT Terms: Cavitation (Mechanics); Cavitation erosion; Force; Hulls; Propellers; Vibration
- Old TRIS Terms: Cavitating propellers; Hull forces; Hull propeller interaction; Propeller forces; Propeller induced vibration
- Subject Areas: Marine Transportation; Vehicles and Equipment;
- 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