THIN-WALLED BEAMS THEORY AND SHIP DESIGN
The origins and the theoretical fundaments of thin-walled beams theory are reported together with a generalized formulation recently outlined by the Author. The theory aims to go over the Navier's assumptions relevant to the beam bending and allows shear and warping stress distributions on a thin-wall beam to be correctly evaluated. Main assumptions of this theory are hereinafter critically analyzed and calculation results are compared with those obtained employing the more complex finite element theory. The comparison agreement is very satisfactory. The theory here reported is widely applied when shear or torsion effects are to be analyzed, due to the geometrical configuration of the structures or to the load patterns acting on them. An important field of application of this theory is the ship structure analysis, mainly for ships supplied with large deck openings. The complexity of load patterns results in a difficult use of more sophisticated calculation techniques. Longitudinal stress distributions, mainly those depending upon torsional load, are not accurately fulfilled by the ordinary beam theory. References report some publications about the present matter.
Registro Italiano Navale20 Via Vente Settembre
- Pittaluga, A
- Publication Date: 1978-4
- Pagination: 65 p.
- TRT Terms: Beams; Buckling; Deformation curve; Finite element method; Loads; Longitudinal strength; Moments (Mechanics); Shear stress; Structural analysis; Torsion
- Old TRIS Terms: Beams (Structural); Shear stress distribution; Torsional moment
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00182466
- Record Type: Publication
- Source Agency: Registro Italiano Navale
- Report/Paper Numbers: Tech Bull n. 63
- Files: TRIS
- Created Date: Sep 27 1978 12:00AM