On the use of the finite element method for the modeling of acoustic scattering from one-dimensional rough fluid-poroelastic interfaces

dc.contributor.advisorHamilton, Mark F.
dc.contributor.advisorChotiros, Nicholas P.
dc.creatorBonomo, Anthony Lucasen
dc.date.accessioned2014-10-02T20:25:11Zen
dc.date.issued2014-05en
dc.date.submittedMay 2014en
dc.date.updated2014-10-02T20:25:11Zen
dc.descriptiontexten
dc.description.abstractA poroelastic finite element formulation originally derived for modeling porous absorbing material in air is adapted to the problem of acoustic scattering from a poroelastic seafloor with a one-dimensional randomly rough interface. The developed formulation is verified through calculation of the plane wave reflection coefficient for the case of a flat surface and comparison with the well known analytical solution. The scattering strengths are then obtained for two different sets of material properties and roughness parameters using a Monte Carlo approach. These numerical results are compared with those given by three analytic scattering models---perturbation theory, the Kirchhoff approximation, and the small-slope approximation---and from those calculated using two finite element formulations where the sediment is modeled as an acoustic fluid.en
dc.description.departmentMechanical Engineeringen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/2152/26240en
dc.language.isoenen
dc.subjectAcoustic scatteringen
dc.subjectPoroelasticityen
dc.subjectRough surface scatteringen
dc.subjectSeafloor scatteringen
dc.subjectBiot theoryen
dc.subjectFinite element methoden
dc.titleOn the use of the finite element method for the modeling of acoustic scattering from one-dimensional rough fluid-poroelastic interfacesen
dc.typeThesisen
thesis.degree.departmentMechanical Engineeringen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Science in Engineeringen

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