NON-UNIFORM TORSION AND SHIPS WITH LARGE HATCHES: A NEW METHOD OF CALCULATION
After an introduction in which the current importance of the study of hull torsion, and in particular the stresses and strains due to non-uniform torsion in ships with large deck-openings, is briefly explained, the Authors describes the development of a method, based on one successfully used in civil engineering, for the analysis of hull structures under such conditions. Existing computer programs are used. The paper is arranged under the main headings: 1. Review of the Problem. 2. Study of the Area between Hatches. Hypothesis--Expression for Continuity Forces--Description of Method Used--Study of the Particular Case of a Ship with a Double Bottom and Hatches Midships along the Main Deck--Generalisation--Example of Applications. 3. Proposed Method of Calculation. Calculation Assumptions--Loads that Induce Hull Torsion--Simplied Representation of the Ship, and Calculation Method for the Study of Torsion. 4. Stresses and Strains in the Non-Uniform Torsion of Ships. Warping Tendency of the Ship's Transverse Section--Stresses--Strains. 5. Conclusions. Under this last heading, the Authors mention inter alia that, for the solution of this problem, approximations based on uniform hull torsion are completely invalid, and that the method of calculation described has been developed with the sole objective of contributing to a more rational solution.
- This paper was presented at the 15th Sesiones Tecnicas de Ingenieria Naval, held in Palma de Mallorca in June 1977.
Asociacion de Ingenieros NavalesApdo Correos 457
- Diaz-Delgado, JRL
- Ramis, A R
- Ventosa, JLT
- Publication Date: 1977-11
- Pagination: 15 p.
- INGENIERIA NAVAL
- Volume: 45
- TRT Terms: Computer programs; Deformation curve; Hatch covers; Hulls; Loads; Stresses; Structural analysis; Torsion
- Old TRIS Terms: Computer programs (Structural analysis); Deck opening stresses; Hatch stress; Hull structural analysis
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00179193
- Record Type: Publication
- Source Agency: British Ship Research Association
- Files: TRIS
- Created Date: Aug 19 1978 12:00AM