DeepAI
Log In Sign Up

Simulation of 3D elasto-acoustic wave propagation based on a Discontinuous Galerkin Spectral Element method

07/11/2019
by   Paola F. Antonietti, et al.
0

In this paper we present a numerical discretization of the coupled elasto-acoustic wave propagation problem based on a Discontinuous Galerkin Spectral Element (DGSE) approach in a three-dimensional setting. The unknowns of the coupled problem are the displacement field and the velocity potential, in the elastic and the acoustic domains, respectively, thereby resulting in a symmetric formulation. After stating the main theoretical results, we assess the performance of the method by convergence tests carried out on both matching and non-matching grids, and we simulate realistic scenarios where elasto-acoustic coupling occurs. In particular, we consider the case of Scholte waves and the scattering of elastic waves by an underground acoustic cavity. Numerical simulations are carried out by means of the code SPEED, available at http://speed.mox.polimi.it.

READ FULL TEXT

page 13

page 16

page 17

page 18

page 19

page 20

page 21

page 22

07/13/2021

3D Acoustic-Elastic Coupling with Gravity: The Dynamics of the 2018 Palu, Sulawesi Earthquake and Tsunami

We present a highly scalable 3D fully-coupled Earth ocean model of e...
06/29/2021

Dynamic phase-field fracture with a first-order discontinuous Galerkin method for elastic waves

We present a new numerical approach for wave induced dynamic fracture. T...
02/08/2021

A hybrid discontinuous Galerkin method for nonlinear elasto-acoustic coupling

Inspired by medical applications of high-intensity ultrasound, we study ...
04/20/2022

Isogeometric Analysis of Acoustic Scattering using Infinite Elements

Isogeometric analysis (IGA) has proven to be an improvement on the class...