A fast and accurate method to compute dispersion spectra for layered media using a modified Kausel-Roesset stiffness matrix approach

Kumar, Jyant and Naskar, Tarun (2017) A fast and accurate method to compute dispersion spectra for layered media using a modified Kausel-Roesset stiffness matrix approach. In: SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 92 . pp. 176-182.

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Abstract

This brief article presents a simple modification to the widely-used Kausel-Roesset Stiffness Matrix Method (SMM), and in particular to its implementation in the context of the Thin-Layer Method (TLM). This modification allows making fast and accurate computations of wavenumber spectra even for layered media underlain by infinitely deep half-spaces. As is well known, the TLM uses a finite element expansion in the depth direction, which in principle disallows exact representations of infinitely deep media other than through Paraxial Approximations or Perfectly Matched Layers. However, with the modification presented herein, that obstacle is removed. The very simple method is first presented and then demonstrated by means of examples involving layered half-spaces.

Item Type:	Journal Article
Publication:	SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
Additional Information:	Copy right for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	31 Jan 2017 05:34
Last Modified:	31 Jan 2017 05:34
URI:	http://eprints.iisc.ac.in/id/eprint/56176

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