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.
M. Mazzotti, I. Bartoli, G. Castellazzi, A. Marzani, Q. Mao (2014). Vibro-acoustic 3D FE simulations to validate a SAFE-BEM formulation for leaky waves computation. Bellingham, Washington 98227-0010 USA : SPIE International Society for Optics and Photonics [10.1117/12.2045005].
Vibro-acoustic 3D FE simulations to validate a SAFE-BEM formulation for leaky waves computation
CASTELLAZZI, GIOVANNI;MARZANI, ALESSANDRO;
2014
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
