Finite-difference time-domain model for elastic waves in the ground

Christoph T. Schroeder; Waymond R. Scott Jr.

doi:10.1117/12.357021

2 August 1999 Finite-difference time-domain model for elastic waves in the ground

Christoph T. Schroeder, Waymond R. Scott Jr.

Proceedings Volume 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV; (1999) https://doi.org/10.1117/12.357021
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

A 2D finite-difference model for elastic waves in the ground has been developed. The model uses the equation of motion and the stress-strain relation, form which a first order stress-velocity formulation is obtained. The resulting system of equations is discretized using centered finite- differences. A perfectly matched layer surrounds the discretized solution space and absorbs the outward traveling waves. The numerical model is validated by comparison to an analytical solution. The numerical model is then sued to study the interaction of elastic waves with buried land miens. Results are presented for a buried antipersonnel mine. It can be seen, that an air-chamber within the mine is excited to resonant oscillations, which are clearly visible on the surface above the mine. The simulation results agree fairly well with experimental observations. Differences are mainly due to the numerical model being 2D. Currently, the finite-difference model is being extended to 3D.

Citation Download Citation

Christoph T. Schroeder and Waymond R. Scott Jr. "Finite-difference time-domain model for elastic waves in the ground", Proc. SPIE 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV, (2 August 1999); https://doi.org/10.1117/12.357021

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available