Statistical energy analysis of marine structures with periodic and near-periodic components
Statistical energy analysis of marine structures with periodic and near-periodic components
Periodic and near-periodic components, in the form of stiffened panels, are found in a wide range of marine structures. The repetitive topology of such structures results in the presence of pass-bands and stop-bands; bands in which energy can flow with little attenuation and high attenuation respectively. In addition, repeated identical stiffener joints result in the filtering of waves. Neither of these effects is modelled in the classical form of the Statistical Energy Analysis (SEA) method. The present work describes the development of a methodology in which the specific characteristics of one-dimensional stiffened panels may be incorporated into SEA.
A technique is described for including a full description of a stiffened panel into the standard SEA formulation in the form of a dissipative coupling element. In conjunction with exact and approximate transmission models developed here for periodic and near-periodically stiffened structures, it is demonstrated that the method correctly models the physics of transmission through stiffened panels and provides a significantly improved model over that achievable with a classical SEA model.
The results obtained from the computational models are validated against experiment and a series of experiments are described in which the effect of single-sided water loading on a panel is investigated. The predominant effect of the fluid on the panel under investigation is demonstrated to be a mass-loading of the panel, resulting in an increase in modal density and a frequency-shift to the pass-bands. As part of the investigation, an experimental validation of a previously derived expression for the point mobility of a fluid-loaded plate is presented.
University of Southampton
Smith, Jeremy Richard Denham
dece5ff9-2676-4d00-bed4-2f81132480c5
1999
Smith, Jeremy Richard Denham
dece5ff9-2676-4d00-bed4-2f81132480c5
Smith, Jeremy Richard Denham
(1999)
Statistical energy analysis of marine structures with periodic and near-periodic components.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
Periodic and near-periodic components, in the form of stiffened panels, are found in a wide range of marine structures. The repetitive topology of such structures results in the presence of pass-bands and stop-bands; bands in which energy can flow with little attenuation and high attenuation respectively. In addition, repeated identical stiffener joints result in the filtering of waves. Neither of these effects is modelled in the classical form of the Statistical Energy Analysis (SEA) method. The present work describes the development of a methodology in which the specific characteristics of one-dimensional stiffened panels may be incorporated into SEA.
A technique is described for including a full description of a stiffened panel into the standard SEA formulation in the form of a dissipative coupling element. In conjunction with exact and approximate transmission models developed here for periodic and near-periodically stiffened structures, it is demonstrated that the method correctly models the physics of transmission through stiffened panels and provides a significantly improved model over that achievable with a classical SEA model.
The results obtained from the computational models are validated against experiment and a series of experiments are described in which the effect of single-sided water loading on a panel is investigated. The predominant effect of the fluid on the panel under investigation is demonstrated to be a mass-loading of the panel, resulting in an increase in modal density and a frequency-shift to the pass-bands. As part of the investigation, an experimental validation of a previously derived expression for the point mobility of a fluid-loaded plate is presented.
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Published date: 1999
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Local EPrints ID: 463630
URI: http://eprints.soton.ac.uk/id/eprint/463630
PURE UUID: b822dd03-903c-4a2a-aa7b-34c26a61ffe6
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Date deposited: 04 Jul 2022 20:54
Last modified: 23 Jul 2022 02:15
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Author:
Jeremy Richard Denham Smith
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