Buscar
Mostrando ítems 1-10 de 46
Lamb mode diversity imaging for non-destructive testing of plate-like structures
(2013-07-18)
Several Lamb wave modes can be coupled to a particular structure, depending on its geometry and transducer used to generate the guided waves. Each Lamb mode interacts in a particular form with different types of defects, ...
Lamb mode diversity imaging for non-destructive testing of plate-like structures
(2013-07-18)
Several Lamb wave modes can be coupled to a particular structure, depending on its geometry and transducer used to generate the guided waves. Each Lamb mode interacts in a particular form with different types of defects, ...
Ultrasound imaging of immersed plates using high-order Lamb modes at their low attenuation frequency bands
(2017-11-01)
This paper focuses on the use of a Lamb wave-based methodology for ultrasound imaging of immersed plate structures. In these cases Lamb waves can be strongly attenuated due to leaky waves and viscous losses in the liquid, ...
Lamb mode diversity imaging fornon-destructivetesting of plate-likestructures
(London, 2014-02-24)
Several Lamb wave modes can be coupled to a particular structure, depending on its geometry and transducer used to generate the guided waves. Each Lamb mode interacts in a particular form with different types of defects, ...
Wave transmission from asymmetrical changes of cross-sectional area in a beam
(2019-07-24)
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 ...
Uso das ondas de Lamb e Scholte para caracterização de líquidos
(Universidade Estadual Paulista (Unesp), 2015-05-29)
The study of the interaction of elastic waves in solids immersed in a fluid has been recognized as a suitable method for fluid characterization. Guided waves in plate-like structures, are mul- timodal and dispersive. These ...
Aplicação de sensor de deslocamento angular em fibra óptica para medição de concentração de líquidos via ondas acústicas guiadas
(Universidade Estadual Paulista (UNESP), 2016)
Improving synthetic aperture image by image compounding in beamforming process
(2011-11-10)
In this work, signal processing techniques are used to improve the quality of image based on multi-element synthetic aperture techniques. Using several apodization functions to obtain different side lobes distribution, a ...