THEORETICAL AND EXPERIMENTAL RESEARCH INTO STRESS CONCENTRATIONS IN WAY OF HATCH CORNERS OF ORE-OIL AND OBO SHIPS
The Authors, of, respectively, CETENA, R.I.Na., and Genoa University, which collaborated in this work, describe a theoretical and experimental investigation of the stress concentrations that occur, in ore/oil and OBO carriers, at the hatch corners, i.e. in the structural connection between the top of the transverse bulkhead and the continuous longitudinal structure at the top of the holds, adjacent to the wing tank. The stress concentrations in this area present problems which differ from those at the hatch corners in other types of ship, and the object of the investigation was to provide information on the behavior of these structural connections. The connections were investigated in two ore/oil carriers, each of about 160,000 dwt, of generally similar construction but differing in detail design of the structure at the hatch corners. The stress distributions were calculated by finite-element methods, and were measured with strain gauges; strain-gauge measurements were also carried out in a third ship, an OBO carrier, but no calculations were made for this ship. The investigation covered various cases of loading in the centre, wing, and double-bottom holds/tanks. The results, which are discussed in some detail, showed good agreement between calculation and experiment. Several conclusions are drawn on the detail design of this part of the structure in the three ships. Order from: BSRA as No. 48,743.
- Paper presented at 1978 Meeting.
Association Technique Maritime et Aeronautique47 rue de Moneeau
75008 Paris, France
- Cortellini, L
- Fanciullacci, G
- Tedeschi, R
- Publication Date: 1978
- Features: References;
- Pagination: 22 p.
- TRT Terms: Deformation curve; Finite element method; Hatch covers; Loads; Ore bulk oil carriers; Ore carriers; Strain gages; Stresses
- Uncontrolled Terms: Stress concentration
- Old TRIS Terms: Hatch stress; Obo hatches
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00180069
- Record Type: Publication
- Source Agency: British Ship Research Association
- Files: TRIS
- Created Date: Sep 27 1978 12:00AM