Analysis of Lamb waves with Spectral Finite Elements

Localization of notches with Lamb waves.

A time-frequency representation (TFR) is used to analyze the interaction of a multimode and dispersive Lamb wave with a notch, and then serves as the basis for a correlation technique to locate the notch. The experimental procedure uses a laser source and a dual-probe laser interferometer to generate and detect Lamb waves in a notched plate. The high fidelity, broad-bandwidth, point-like and no...

seismic analysis of rectangular alluvial valleys subjected to incident sv waves by using the spectral finite element method

in this paper, an advanced formulation of the spectral finite element method (sfem) is presented and applied in order to carry out site response analysis of 2d topographic structures subjected to vertically propagating incident in-plane waves in time-domain. the accuracy, efficiency and applicability of the formulation are demonstrated by solving some wave scattering examples. a numerical param...

Attenuation Analysis of Lamb Waves Using the Chirplet Transform

1 Institute of Mathematics and Computing Science, University of Groningen, 9700 AV Groningen, The Netherlands 2 Institute of Applied and Experimental Mechanics, University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany 3Computer Science Department, University of North Carolina, Chapel Hill, NC 27599-3175, USA 4School of Civil and Environmental Engineering and G.W.Woodruff School of M...

New Finite Elements for Large-Scale Simulation of Optical Waves

Nonlinear Finite Element Analysis of Bending of Straight Beams Using hp-Spectral Approximations

Displacement finite element models of various beam theories have been developed using traditional finite element interpolations (i.e., Hermite cubic or equi-spaced Lagrange functions). Various finite element models of beams differ from each other in the choice of the interpolation functions used for the transverse deflection w, total rotation φ and/or shear strain γxz, or in the integral form u...