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A comparison of numerical methods to predict the progressive collapse of lightweight aluminium vessels

A comparison of numerical methods to predict the progressive collapse of lightweight aluminium vessels
A comparison of numerical methods to predict the progressive collapse of lightweight aluminium vessels
This article presents a comparison of several methods to predict the primary longitudinal bending moment?curvature relationship for a series of box beams with dimensions equivalent to a large, lightweight aluminium ship. The comparative study includes the application of an extended progressive collapse methodology, which has been developed specifically to predict the strength behavior of lightweight hull structures under primary bending moment and accounts for compartment-level, gross panel buckling effects of the orthogonally stiffened structure. The approach is based on the principles of the Smith progressive collapse method, which has been shown to be a capable measure of ultimate strength when applied to steel ships. However, a fundamental premise of the Smith method is that buckling forms an interframe. The extended method discards this assumption and includes overall gross panel buckling effects in the determination of girder strength. For the case study, both the interframe and compartment behavior of the case study box girders are compared. The results are also compared with nonlinear finite element analyses of the box girders. The nonlinear finite element method is being increasingly applied to predict hull girder progressive collapse and, provided computation time is acceptable, will predict collapse modes over an entire compartment. The extended progressive collapse method is shown to compare favorably to the equivalent finite element analysis when overall buckling modes dominate
117-126
Benson, Simon
4ccd43fd-ddf8-4e7b-826f-16dc123a7b57
Downes, Jonathan
ebc0f09b-9d33-4815-bedf-bc77df59c822
Dow, Robert S.
3f6aaba8-876a-4a26-b2c2-58e96624d990
Benson, Simon
4ccd43fd-ddf8-4e7b-826f-16dc123a7b57
Downes, Jonathan
ebc0f09b-9d33-4815-bedf-bc77df59c822
Dow, Robert S.
3f6aaba8-876a-4a26-b2c2-58e96624d990

Benson, Simon, Downes, Jonathan and Dow, Robert S. (2013) A comparison of numerical methods to predict the progressive collapse of lightweight aluminium vessels. Journal of Ship Production and Design, 29 (3), 117-126. (doi:10.5957/JSPD.29.3.120054).

Record type: Article

Abstract

This article presents a comparison of several methods to predict the primary longitudinal bending moment?curvature relationship for a series of box beams with dimensions equivalent to a large, lightweight aluminium ship. The comparative study includes the application of an extended progressive collapse methodology, which has been developed specifically to predict the strength behavior of lightweight hull structures under primary bending moment and accounts for compartment-level, gross panel buckling effects of the orthogonally stiffened structure. The approach is based on the principles of the Smith progressive collapse method, which has been shown to be a capable measure of ultimate strength when applied to steel ships. However, a fundamental premise of the Smith method is that buckling forms an interframe. The extended method discards this assumption and includes overall gross panel buckling effects in the determination of girder strength. For the case study, both the interframe and compartment behavior of the case study box girders are compared. The results are also compared with nonlinear finite element analyses of the box girders. The nonlinear finite element method is being increasingly applied to predict hull girder progressive collapse and, provided computation time is acceptable, will predict collapse modes over an entire compartment. The extended progressive collapse method is shown to compare favorably to the equivalent finite element analysis when overall buckling modes dominate

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More information

Published date: August 2013
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 363771
URI: http://eprints.soton.ac.uk/id/eprint/363771
PURE UUID: eb09f3cc-b4ea-47b5-be92-cf55fb3dd76f
ORCID for Jonathan Downes: ORCID iD orcid.org/0000-0003-2027-4474

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Date deposited: 03 Apr 2014 10:25
Last modified: 09 Jan 2022 03:46

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Contributors

Author: Simon Benson
Author: Jonathan Downes ORCID iD
Author: Robert S. Dow

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