Vibro-acoustic 3D FE simulations to validate a SAFE-BEM formulation for leaky waves computation

M. Mazzotti; I. Bartoli; G. Castellazzi; A. Marzani; Q. Mao

doi:10.1117/12.2045005

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9 March 2014 Vibro-acoustic 3D FE simulations to validate a SAFE-BEM formulation for leaky waves computation

M. Mazzotti, I. Bartoli, G. Castellazzi, A. Marzani, Q. Mao

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Proceedings Volume 9064, Health Monitoring of Structural and Biological Systems 2014; 906413 (2014) https://doi.org/10.1117/12.2045005
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

Vibroacoustic three-dimensional finite element simulations are performed to validate a novel formulation that model leaky guided waves properties for waveguides surrounded by fluids. The above formulation couples a mesh of semi-analytical finite elements (SAFE), to discretize the waveguide cross-section, with a mesh of boundary elements (BEM) to model the unbounded outer fluid domain. The resulting dispersion curves are validated through dedicated finite element simulations where the extracted time-transient waveforms are analyzed via a modified Matrix Pencil Method in time and space. Wave simulations are achieved using ABAQUS/Explicit for an elastic steel bar of square cross section immersed in water and the results obtained are compared with those given by the SAFE-BEM method.

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M. Mazzotti, I. Bartoli, G. Castellazzi, A. Marzani, and Q. Mao "Vibro-acoustic 3D FE simulations to validate a SAFE-BEM formulation for leaky waves computation", Proc. SPIE 9064, Health Monitoring of Structural and Biological Systems 2014, 906413 (9 March 2014); https://doi.org/10.1117/12.2045005

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