About: Inversion for weak triclinic anisotropy from acoustic axes

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Acoustic axes are directions in anisotropic elastic media, in which phase velocities of two or three plane waves (P, S1 or S2 waves) coincide. Acoustic axes are important, because they can cause singularities in the field of polarization vectors and anomalies in the shape of the slowness surface. The maximum number of acoustic axes in triclinic anisotropy is 16, and their directions depend on anisotropy parameters in a complicate way. Under weak anisotropy approximation this dependence simplifies and the directions of acoustic axes can be used for the inversion for anisotropy parameters. The maximum acoustic axes under weak anisotropy is 16, the minimum number of acoustic axes is zero. In the inversion, we can retrieve 13 combinations of anisotropy parameters provided we use directions of 7 acoustic axes at least. Under weak anisotropy approximation, the directions of acoustic axes are insensitive to strength of anisotropy; hence we cannot invert for absolute values of weak anisotropy parameters, but only for their relative values. Acoustic axes are directions in anisotropic elastic media, in which phase velocities of two or three plane waves (P, S1 or S2 waves) coincide. Acoustic axes are important, because they can cause singularities in the field of polarization vectors and anomalies in the shape of the slowness surface. The maximum number of acoustic axes in triclinic anisotropy is 16, and their directions depend on anisotropy parameters in a complicate way. Under weak anisotropy approximation this dependence simplifies and the directions of acoustic axes can be used for the inversion for anisotropy parameters. The maximum acoustic axes under weak anisotropy is 16, the minimum number of acoustic axes is zero. In the inversion, we can retrieve 13 combinations of anisotropy parameters provided we use directions of 7 acoustic axes at least. Under weak anisotropy approximation, the directions of acoustic axes are insensitive to strength of anisotropy; hence we cannot invert for absolute values of weak anisotropy parameters, but only for their relative values. (en)
Title	Inversion for weak triclinic anisotropy from acoustic axes Inversion for weak triclinic anisotropy from acoustic axes (en)
skos:prefLabel	Inversion for weak triclinic anisotropy from acoustic axes Inversion for weak triclinic anisotropy from acoustic axes (en)
skos:notation	RIV/67985530:_____/13:00397121!RIV14-AV0-67985530
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(IAA300120801)
http://linked.open...iv/cisloPeriodika	8
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Vavryčuk, Václav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Geofyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	81057
http://linked.open...ai/riv/idVysledku	RIV/67985530:_____/13:00397121
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	acoustic axis; weak anisotropy; elastic waves; wave polarization (en)
http://linked.open.../riv/klicoveSlovo	acoustic axis wave polarization weak anisotropy elastic waves
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[DADF310C8721]
http://linked.open...i/riv/nazevZdroje	Wave Motion
http://linked.open...in/vavai/riv/obor	DC
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	1 (xsd:int)
http://linked.open...vavai/riv/projekt	Seismic waves and sources in anisotropic media II
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	50
http://linked.open...iv/tvurceVysledku	Vavryčuk, Václav
http://linked.open...ain/vavai/riv/wos	000326556200009
issn	0165-2125
number of pages	12 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.wavemoti.2012.11.003

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