Weak-anisotropy approximations of P-wave phase and ray velocities for anisotropy of arbitrary symmetry
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F16%3A00458982" target="_blank" >RIV/67985530:_____/16:00458982 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1007/s11200-015-1276-0" target="_blank" >http://dx.doi.org/10.1007/s11200-015-1276-0</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11200-015-1276-0" target="_blank" >10.1007/s11200-015-1276-0</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Weak-anisotropy approximations of P-wave phase and ray velocities for anisotropy of arbitrary symmetry
Popis výsledku v původním jazyce
We test the accuracy of the previously derived weak-anisotropy approximations of the P-wave phase and ray (group) velocities. The formulae are of varying accuracy, and are applicable to weak or moderate anisotropy of arbitrary symmetry and orientation. They have a form of expressions for squares of phase velocity depending on the phase-velocity direction and of ray velocity depending on the ray-velocity direction. Both velocities are expressed in terms of three elements of the rotated Christoffel matrix, which depend linearly on the parameters specifying the medium, the weak-anisotropy parameters. The least accurate formulae are fully independent of the choice of a reference isotropic medium and depend linearly on weak-anisotropy parameters. The most accurate formulae depend only slightly on the ratio of S- and P-wave velocities of a reference medium, their dependence on weak-anisotropy parameters being quadratic. We show that the accuracy of the formulae is quite high, in fact, in some cases, it is close to the accuracy of the socalled anelliptic approximations, very accurate approximations based on a perturbation of the elliptical anisotropy.
Název v anglickém jazyce
Weak-anisotropy approximations of P-wave phase and ray velocities for anisotropy of arbitrary symmetry
Popis výsledku anglicky
We test the accuracy of the previously derived weak-anisotropy approximations of the P-wave phase and ray (group) velocities. The formulae are of varying accuracy, and are applicable to weak or moderate anisotropy of arbitrary symmetry and orientation. They have a form of expressions for squares of phase velocity depending on the phase-velocity direction and of ray velocity depending on the ray-velocity direction. Both velocities are expressed in terms of three elements of the rotated Christoffel matrix, which depend linearly on the parameters specifying the medium, the weak-anisotropy parameters. The least accurate formulae are fully independent of the choice of a reference isotropic medium and depend linearly on weak-anisotropy parameters. The most accurate formulae depend only slightly on the ratio of S- and P-wave velocities of a reference medium, their dependence on weak-anisotropy parameters being quadratic. We show that the accuracy of the formulae is quite high, in fact, in some cases, it is close to the accuracy of the socalled anelliptic approximations, very accurate approximations based on a perturbation of the elliptical anisotropy.
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
DC - Seismologie, vulkanologie a struktura Země
OECD FORD obor
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Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Studia geophysica et geodaetica
ISSN
0039-3169
e-ISSN
—
Svazek periodika
60
Číslo periodika v rámci svazku
3
Stát vydavatele periodika
CZ - Česká republika
Počet stran výsledku
16
Strana od-do
403-418
Kód UT WoS článku
000382365100004
EID výsledku v databázi Scopus
2-s2.0-84964199174