A Design Procedure for Minimizing Propeller-Induced Vibration in Hull Structural Elements.
Abstract
A design procedure for minimizing propeller-induced vibration in hull structural elements is recommended. This procedure begins when the ship's vibration specifications are defined and continues through the design and construction process until the vibration levels measured during sea trials are compared with the specifications. Consideration is given to the hydrodynamic excitation and structural response of the propeller-induced vibration problem, with both analytical and experimental techniques being used in the design process. The recommended procedure is presented and discussed in the form of a flow diagram with 27 separate design steps. The process also contains five evaluation milestones. At these points, the design is assessed, and, if deficiencies are found, corrective action can be taken before the design proceeds. The recommended complete procedure is presented in this report for the first time. Many of the aspects of this procedure are still being developed, in particular, the influence of propeller cavitation on hull pressures and a simple but accurate treatment of water inertia. These indefinite aspects have to be treated empirically using judgement and experimental data. The portions of the procedure which are available are illustrated in an example using a single-screw, containerized and unitized cargo ship. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1979
- Accession Number
- ADA079443
Entities
People
- D. D. Kana
- F. E. Reed
- O. H. Burnside
Organizations
- Southwest Research Institute