Wave transmission from asymmetrical changes of cross-sectional area in a beam | Zendy

Breno Ebinuma Takiuti | Zendy; Elisabetta Manconi | Zendy; M.J. Brennan | Zendy; Vicente Lopes | Zendy

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Wave transmission from asymmetrical changes of cross-sectional area in a beam

Author(s) -

Breno Ebinuma Takiuti,

Elisabetta Manconi,

M.J. Brennan,

Vicente Lopes

Publication year - 2019

Publication title -

journal of physics conference series

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.21

H-Index - 85

eISSN - 1742-6596

pISSN - 1742-6588

DOI - 10.1088/1742-6596/1264/1/012056

Subject(s) - antisymmetric relation , lamb waves , discontinuity (linguistics) , beam (structure) , physics , scattering , optics , transmission (telecommunications) , energy (signal processing) , surface wave , acoustics , mathematical analysis , engineering , telecommunications , mathematics , quantum mechanics , mathematical physics

In this paper wave scattering from an asymmetrical change of cross-sectional area in a beam is numerically studied. Incident symmetric and antisymmetric Lamb waves are considered and multiple wave mode conversion due to interaction with the discontinuity are investigated up to high frequency (above the cut-off of the second symmetric Lamb wave mode, S 2 ). Results are presented in terms of transmission power coefficients, kinetic energy, and energy velocity. These are evaluated using the Wave Finite Element method to predict the wave modes from FE cross-sectional nodal displacements and nodal forces. It is shown that the methodology proposed can give an insight into wave scattering and multiple converted Lamb wave modes, which can be useful in Structural Health Monitoring.

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