Asymptotically Matched Layer (AML) for transient wave propagation in a moving frame of reference

Stine Skov Madsen, Steen Krenk

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Abstract

The paper presents an Asymptotically Matched Layer (AML) formulation in a moving frame of reference for transient dynamic response of a multi-layer 2D half-space. A displacement based finite element formulation of the convected domain problem is presented together with the AML formulation in which the original convolution integrals are represented via two auxiliary displacement-like state-space variables. A parametric study of the AML parameters is conducted for optimizing the absorbing properties. The performance is demonstrated on a single- and a two-layered half-space for various velocities of an impulse Ricker load. Excellent absorbing properties are demonstrated in both half spaces.
Original languageEnglish
JournalComputers and Geotechnics
Volume82
Pages (from-to)124-133
ISSN0266-352X
DOIs
Publication statusPublished - 2017

Keywords

  • Convected coordinates
  • Finite element method
  • Absorbing boundary
  • PML
  • Moving load
  • Transient wave propagation

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