title: Computation of leaky guided waves dispersion spectrum using vibroacoustic analyses and the Matrix Pencil Method: a validation study for immersed rectangular waveguides.
abstract: The paper aims at validating a recently proposed Semi Analytical Finite Element (SAFE) formulation coupled with a 2.5D Boundary Element Method (2.5D BEM) for the extraction of dispersion data in immersed waveguides of generic cross-section. To this end, three-dimensional vibroacoustic analyses are carried out on two waveguides of square and rectangular cross-section immersed in water using the commercial Finite Element software Abaqus/Explicit. Real wavenumber and attenuation dispersive data are extracted by means of a modified Matrix Pencil Method. It is demonstrated that the results obtained using the two techniques are in very good agreement.
authors.affiliation: Civil, Architectural & Environmental Engineering (CAEE) Department, Drexel University, 3141 Chestnut St., Philadelphia, PA 19104, USA.
authors.forename: M
authors.initials: M
authors.lastname: Mazzotti
authors.affiliation: Civil, Architectural & Environmental Engineering (CAEE) Department, Drexel University, 3141 Chestnut St., Philadelphia, PA 19104, USA. Electronic address: ib77@drexel.edu.
authors.forename: I
authors.initials: I
authors.lastname: Bartoli
authors.affiliation: Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali (DICAM), Università degli Studi di Bologna, Viale Risorgimento 2, 40136 Bologna, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Castellazzi
authors.affiliation: Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali (DICAM), Università degli Studi di Bologna, Viale Risorgimento 2, 40136 Bologna, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Marzani
keywords: Abaqus; Dispersion; Fluid; Leaky guided waves; Matrix Pencil Method