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elastic wave

Numerical modeling of elastic wave propagation in prestressed helical waveguides with the safe method

Numerical modeling of elastic wave propagation in prestressed helical waveguides with the safe method

... Laguerre, L., J.-C Aime and M. Brissaud (2002 a), “Magnetostrictive pulse-echo device for non-destructive evaluation of cylindrical steel materials using longitudinal guided waves,” Ultrasonics , 39, 503–514. Kwun, H., ...

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Elastic wave velocity evolution of shales deformed under uppermost crustal conditions

Elastic wave velocity evolution of shales deformed under uppermost crustal conditions

... the raypath, and 𝜓 refers to the angle between the radial stress 𝜎 3 and the raypath in the bedding plane for experiments performed with the axial stress paral- lel to the bedding plane. Each transducer consists of a ...

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Dilatation of a one-dimensional nonlinear crack impacted by a periodic elastic wave

Dilatation of a one-dimensional nonlinear crack impacted by a periodic elastic wave

... PERIODIC ELASTIC WAVE ST´ EPHANE JUNCA † AND BRUNO LOMBARD ‡ ...linear elastic waves and a nonlinear crack with finite com- pressibility are studied in the one-dimensional ...scattered elastic ...

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Resolution strategy for the Hybridizable Discontinuous Galerkin system for solving Helmholtz elastic wave equations

Resolution strategy for the Hybridizable Discontinuous Galerkin system for solving Helmholtz elastic wave equations

... Resolution strategy for the Hybridizable Discontinuous Galerkin system for solving Helmholtz elastic wave equations.. Face to face meeting HPC4E Brazilian-European project, Sep 2016, Gra[r] ...

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Hybridizable discontinuous Galerkin method for the two-dimensional frequency-domain elastic wave equations

Hybridizable discontinuous Galerkin method for the two-dimensional frequency-domain elastic wave equations

... SUMMARY Discontinuous Galerkin (DG) methods are nowadays actively studied and increasingly ex- ploited for the simulation of large-scale time-domain (i.e. unsteady) seismic wave prop- agation problems. Although ...

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A nodal high-order discontinuous Galerkin method for elastic wave propagation in arbitrary heterogeneous media

A nodal high-order discontinuous Galerkin method for elastic wave propagation in arbitrary heterogeneous media

... Accepted 2015 January 15. Received 2015 January 12; in original form 2014 August 26 S U M M A R Y We present an extension of the nodal discontinuous Galerkin method for elastic wave propaga- tion to high ...

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Mathematical modelling and numerical simulation of elastic wave propagation in soft tissues with application to cardiac elastography

Mathematical modelling and numerical simulation of elastic wave propagation in soft tissues with application to cardiac elastography

... The idea to combine the internal excitation of the tissue by an acoustic pulse and the characterisation of the generated shear waves is due to Dr. Armen Sarvazyan [ Sarvazyan et al. , 1998 ]. Subsequently, numerous ...

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Measuring anisotropy of elastic wave velocity with ultrasound imaging and an autofocus method: application to cortical bone

Measuring anisotropy of elastic wave velocity with ultrasound imaging and an autofocus method: application to cortical bone

... ultrasonic wave-speed was proposed as a biomarker of the quality of cortical bone tissue [16], ...the elastic anisotropy of cortical bone in vivo with ultrasound has been only recently addressed ...of ...

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A High-order Discontinuous Galerkin Scheme for Elastic Wave Propagation

A High-order Discontinuous Galerkin Scheme for Elastic Wave Propagation

... 1 Introduction Computational seismology has become a very important discipline for accurate estimates of ground motion thanks to constant increase of computational re- sources, a better understanding of physical ...

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Comparison of solvers performance when solving the 3D Helmholtz elastic wave equations using the Hybridizable Discontinuous Galerkin method

Comparison of solvers performance when solving the 3D Helmholtz elastic wave equations using the Hybridizable Discontinuous Galerkin method

... Comparison of solvers performance when solving the 3D Helmholtz elastic wave equations using the Hybridizable Discontinuous Galerkin method M... MotivationsB[r] ...

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Discontinuous Galerkin methods for the simulation of the propagation of the elastic wave equations in the frequency domain

Discontinuous Galerkin methods for the simulation of the propagation of the elastic wave equations in the frequency domain

... With the goal to develop more accurate, more efficient and cheaper forward solvers, we are interested here in solving the elastic Helmholtz equations with DG methods. In his doctoral thesis, R. Brossier [3] ...

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Comparison of solvers performance when solving the 3D Helmholtz elastic wave equations over the Hybridizable Discontinuous Galerkin method

Comparison of solvers performance when solving the 3D Helmholtz elastic wave equations over the Hybridizable Discontinuous Galerkin method

... Comparison of solvers performance when solving the 3D Helmholtz elastic wave equations over the Hybridizable Discontinuous Galerkin method.. M..[r] ...

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Hybridizable Discontinuous Galerkin method for the simulation of the propagation of the elastic wave equations in the frequency domain

Hybridizable Discontinuous Galerkin method for the simulation of the propagation of the elastic wave equations in the frequency domain

... [15] M. Ainsworth, P. Monk, and W. Muniz. Dispersive and Dissipative Properties of Discontinuous Galerkin Finite Element Methods for the Second-Order Wave Equation. Journal of Scientific Computing, 27(1-3):5–40, ...

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An efficient formulation for the simulation of elastic wave propagation in 1-dimensional collinding bodies

An efficient formulation for the simulation of elastic wave propagation in 1-dimensional collinding bodies

... All procedures rely on the bracketing of an event after detection through a sign change of the event function.. Bisection is used if convergence is too slow.[r] ...

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Efficiency of the spectral element method with very high polynomial degree to solve the elastic wave equation

Efficiency of the spectral element method with very high polynomial degree to solve the elastic wave equation

... the wave equation at all ...the wave equation which smooths out the internal mechanical discontinuities of the elastic ...the wave equation in many ...

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Fictitious Domains, Mixed Finite Elements and Perfectly Matched Layers for 2D Elastic Wave Propagation

Fictitious Domains, Mixed Finite Elements and Perfectly Matched Layers for 2D Elastic Wave Propagation

... Unit´e de recherche INRIA Lorraine, Technopˆole de Nancy-Brabois, Campus scientifique, ` NANCY 615 rue du Jardin Botanique, BP 101, 54600 VILLERS LES Unit´e de recherche INRIA Rennes, Ir[r] ...

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2-D non-periodic homogenization of the elastic wave equation: SH case

2-D non-periodic homogenization of the elastic wave equation: SH case

... homogenized elastic properties in the unit cell, are close to being isotropic, which is in fact the case - and that (45) can be rearranged as in Capdeville et ...

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Second order homogenization of the elastic wave equation for non-periodic layered media

Second order homogenization of the elastic wave equation for non-periodic layered media

... Figure 11. Same as Fig. 9 but this time, the homogenization has been performed with the symmetric extension. In that case, the order 0 is also the order 1 which explain why no ‘order 1’ solution is plotted. The ...

17

Asymmetric Modes of Elastic Wave Propagation in a Fluid-Filled Borehole

Asymmetric Modes of Elastic Wave Propagation in a Fluid-Filled Borehole

... At sharp interfaces, where the elastic parameters varied from liquid to solid over a few grid points, the finite difference formulation of the wave equation for heterogeneous media was u[r] ...

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Modelling of elastic wave propagation in prestressed helical waveguides

Modelling of elastic wave propagation in prestressed helical waveguides

... Conclusion A SAFE method is proposed to analyse the effect of prestress on wave propagation in straight and he- lical waveguides. This SAFE method is based on the equation of prestressed structural dynamics, which ...

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