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The effects of geometric detail on the vibratory responses of complex 2 ship-like thin-walled structures

The effects of geometric detail on the vibratory responses of complex 2 ship-like thin-walled structures
The effects of geometric detail on the vibratory responses of complex 2 ship-like thin-walled structures
Hydroelasticity of ships and studies in coupled antisymmetric vibrations have become increasingly important
with container ships becoming faster and more slender. In this investigation, a ship-like structure is modelled and an equivalent backbone with a U-shaped cross section is designed. Their responses are compared, and limitations of various modelling approaches are discussed. It is demonstrated that scaling of the natural frequencies is insufficient to ensure scaling of the antisymmetric mode shapes and the relevant differences are quantified. Consequently, the backbone model should be viewed as a separate structure for validation purposes rather than a scaled model of a ship
cellular, geometric detail, modal testing, prismatic beam structures, structural vibrations, thin-walled hull girders
0951-8339
1-14
Grammatikopoulos, Apostolos
7975d020-159a-498e-adba-8f301b701a90
Grammatikopoulos, Apostolos
7975d020-159a-498e-adba-8f301b701a90

Grammatikopoulos, Apostolos (2021) The effects of geometric detail on the vibratory responses of complex 2 ship-like thin-walled structures. Marine Structures, 78, 1-14, [103013]. (doi:10.1016/j.marstruc.2021.103013).

Record type: Article

Abstract

Hydroelasticity of ships and studies in coupled antisymmetric vibrations have become increasingly important
with container ships becoming faster and more slender. In this investigation, a ship-like structure is modelled and an equivalent backbone with a U-shaped cross section is designed. Their responses are compared, and limitations of various modelling approaches are discussed. It is demonstrated that scaling of the natural frequencies is insufficient to ensure scaling of the antisymmetric mode shapes and the relevant differences are quantified. Consequently, the backbone model should be viewed as a separate structure for validation purposes rather than a scaled model of a ship

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Accepted/In Press date: 9 April 2021
e-pub ahead of print date: 18 April 2021
Keywords: cellular, geometric detail, modal testing, prismatic beam structures, structural vibrations, thin-walled hull girders

Identifiers

Local EPrints ID: 450082
URI: http://eprints.soton.ac.uk/id/eprint/450082
ISSN: 0951-8339
PURE UUID: 369908eb-0ba6-4def-b4e9-77e6f6cbd03a
ORCID for Apostolos Grammatikopoulos: ORCID iD orcid.org/0000-0003-1800-7406

Catalogue record

Date deposited: 08 Jul 2021 16:32
Last modified: 25 Nov 2021 20:42

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Author: Apostolos Grammatikopoulos ORCID iD

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