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SH plane-wave reflection/transmission coefficients in isotropic, attenuating media
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SYSNO ASEP 0548480 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název SH plane-wave reflection/transmission coefficients in isotropic, attenuating media Tvůrce(i) Pšenčík, Ivan (GFU-E) ORCID, RID
Wcislo, Milosz (USMH-B) RID, ORCID
Daley, P. F. (CA)Zdroj.dok. Journal of Seismology. - : Springer - ISSN 1383-4649
Roč. 26, č. 1 (2022), s. 15-34Poč.str. 20 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova attenuation ; weak-attenuation concept ; correspondence principle ; SH-wave displacement ; reflection/transmission coefficients Vědní obor RIV DC - Seismologie, vulkanologie a struktura Země Obor OECD Volcanology Vědní obor RIV – spolupráce Ústav struktury a mechaniky hornin - Seismologie, vulkanologie a struktura Země CEP LM2015079 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora GFU-E - RVO:67985530 ; USMH-B - RVO:67985891 UT WOS 000721400200001 EID SCOPUS 85119876397 DOI 10.1007/s10950-021-10052-x Anotace An attempt is made to extend the applicability of the weak-attenuation concept (WAC) to ray-theory computations. WAC allows an approximate evaluation of effects of attenuation on seismic-wave propagation in smoothly varying laterally inhomogeneous media encountered in most seismological studies. The goal is to find under which conditions WAC could be applicable to layered media. Specifically, if the use of WAC is necessary, under which conditions it can be used for the approximate evaluation of the reflection and transmission coefficients at interfaces separating attenuating media. It turns out that outside critical incidence regions, where the ray theory is not applicable, the effects of attenuation on the reflection and transmission are negligible in comparison with effects of attenuation on wave propagation inside layers. Despite it, the approximate formulae for reflection and transmission coefficients including effects of attenuation are derived and presented. For better insight and simplicity, effects of attenuation on SH plane-wave coefficients at interfaces separating homogeneous, attenuating isotropic half-spaces are studied. The coefficients are expressed in the form of the sum of coefficients in a reference elastic medium plus a perturbation due to weak attenuation. The study is based on the assumption of the validity of the correspondence principle despite indications of its inapplicability in some situations. A fixed frequency is considered. A basic role in the evaluation of coefficients is played by slowness vectors of incident and transmitted waves. They are required to satisfy constraints resulting from the corresponding equation of motion, Snell's law and radiation condition. The resulting formulae for coefficients are singular for the angles corresponding to critical incidence in the reference elastic medium. Pracoviště Geofyzikální ústav Kontakt Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Rok sběru 2023 Elektronická adresa https://link.springer.com/article/10.1007/s10950-021-10052-x
Počet záznamů: 1