The effects of geometric detail on the vibratory responses of complex ship-like thin-walled structures
The effects of geometric detail on the vibratory responses of complex 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
1-14
Grammatikopoulos, Apostolos
7975d020-159a-498e-adba-8f301b701a90
July 2021
Grammatikopoulos, Apostolos
7975d020-159a-498e-adba-8f301b701a90
Grammatikopoulos, Apostolos
(2021)
The effects of geometric detail on the vibratory responses of complex ship-like thin-walled structures.
Marine Structures, 78, , [103013].
(doi:10.1016/j.marstruc.2021.103013).
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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Revised Manuscript
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Accepted/In Press date: 9 April 2021
e-pub ahead of print date: 18 April 2021
Published date: July 2021
Additional Information:
Funding Information:
The author acknowledges the use of the IRIDIS High Performance Computing Facility, and associated support services at the University of Southampton, in the completion of this work. The author would like to thank J.M.F.A. Blanchard for the invaluable feedback on this manuscript.
Publisher Copyright:
© 2021 Elsevier Ltd
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
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Date deposited: 08 Jul 2021 16:32
Last modified: 17 Mar 2024 06:41
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Author:
Apostolos Grammatikopoulos
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