PROBABILISTIC DESIGN CONCEPTS IN SHIP STRUCTURAL SAFETY AND RELIABILITY
Structural reliability and safety concepts have been studied deeply and applied to many civil engineering structures such as buildings, bridges, towers and dams. These concepts have been used successfully in other fields also, principally in aeronautics and aerospace, automobiles, and trains. In naval architecture, little has been done in this area despite the obvious randomness of the variables involved in the design of a marine vehicle, particularly with regard to sea loads. This paper presents a comprehensive probabilistic model for formulating structural design criteria in ships. It covers the overall structural strength of ships under the random sea loads from a probabilistic point of view. A risk measure that accounts for the uncertainties associated with the design variables involved in the structural aspects is described. A method for a systematic analysis of these uncertainties and their effects on the calculated risk is given. The application of the long-term and short-term design criteria on a Mariner ship is illustrated as an example, and compared with the conventional safety factor of the deterministic approach.
- Presented at the Annual Meeting of SNAME. Paper #2.
Society of Naval Architects and Marine Engineers601 Pavonia Avenue
Jersey City, NJ USA 07306-2907
- Mansour, A E
- Publication Date: 1972-11-16
- Features: References;
- Pagination: 25 p.
- TRT Terms: Fatigue (Mechanics); Fracture mechanics; Hydrodynamics; Ship motion
- Uncontrolled Terms: Structural stability
- Old TRIS Terms: Random fatigue; Sea loads; Seaway motions
- Subject Areas: Hydraulics and Hydrology; Marine Transportation; Materials;
- Accession Number: 00039341
- Record Type: Publication
- Source Agency: Society of Naval Architects and Marine Engineers
- Files: TRIS
- Created Date: Nov 10 1972 12:00AM