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Ultimate limit state analysis of a double-hull tanker subjected to biaxial bending in intact and collision-damaged conditions
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics. Chalmers University of Technology, Sweden.ORCID iD: 0000-0001-7182-0872
National Institute of Maritime, Japan.
2020 (English)In: Ocean Engineering, ISSN 0029-8018, E-ISSN 1873-5258, Vol. 209, article id 107519Article in journal (Refereed) Published
Abstract [en]

This study presents a comparison between nonlinear finite element analysis (FEA) and the Smith method of Fujikubo et al. (2012). The objective was to compare the accuracy and computation effort of the two methods for a double-hull tanker under biaxial bending and various ship conditions: intact hull structure, collision-damaged hull structure, newly built condition, and ship hull aged due to corrosion. The results for the non-corroded and intact ship hull structures showed good agreement between FEA, the Smith method and IACS CSR-H for vertical bending loading conditions. For all other bending load combinations, FEA always gave lower ultimate bending moments than the Smith method. The differences between the two methods were larger for the corroded and damaged ship hull structure than for other conditions. Results from ultimate strength analyses of the collision-damaged hull structures showed that both methods captured the expected asymmetric ultimate strength response due to asymmetric damage. A residual strength index calculation showed that the reduction was larger for the FEA than for the Smith method. A procedure is proposed that combines results of a few FEAs with the advantages of the Smith method to generate accurate biaxial bending load interaction curves for different ship conditions. © 2020 Elsevier Ltd

Place, publisher, year, edition, pages
Elsevier Ltd , 2020. Vol. 209, article id 107519
Keywords [en]
Biaxial bending, Corrosion, Finite element analysis, Progressive collapse, Residual strength index, Ship collision, Smith method, Ultimate state, Ultimate strength, Tankers (ships), Biaxial bending loads, Computation effort, Double hull tanker, Nonlinear finite element analyses (FEA), Ship hull structure, Ultimate limit state, Ultimate strength analysis, Hulls (ship)
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-45073DOI: 10.1016/j.oceaneng.2020.107519Scopus ID: 2-s2.0-85085595492OAI: oai:DiVA.org:ri-45073DiVA, id: diva2:1449766
Note

Funding details: TRV 2019/42277; Funding details: Trafikverket; Funding text 1: This study received financial support from the Swedish Transport Administration project “SHARC - Structural and Hydro mechanical Assessment of Risk in Collision and grounding” (grant agreement: TRV 2019/42277 ). The FEAs were partly performed on resources at the Chalmers Centre for Computational Science and Engineering (C3SE www.c3se.chalmers.se ) provided by the Swedish National Infrastructure for Computing (SNIC).

Available from: 2020-06-30 Created: 2020-06-30 Last updated: 2021-03-26Bibliographically approved

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Johnson, Erland

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