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Comparative Measurements of Local Seismic Rotations by Three Independent Methods
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SYSNO ASEP 0534817 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Comparative Measurements of Local Seismic Rotations by Three Independent Methods Tvůrce(i) Brokešová, J. (CZ)
Málek, Jiří (USMH-B) RID, ORCID, SAIČíslo článku 5679 Zdroj.dok. Sensors. - : MDPI
Roč. 20, č. 19 (2020)Poč.str. 23 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova seismic rotation ; rotational seismometer ; Rotaphone ; seismic array Vědní obor RIV DB - Geologie a mineralogie Obor OECD Geology CEP LTAUSA19083 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora USMH-B - RVO:67985891 UT WOS 000586718000001 EID SCOPUS 85092217091 DOI 10.3390/s20195679 Anotace A comparative active experiment that is aimed at collocated measurement of seismic rotation rates along three orthogonal axes by means of three different methods is described. The rotation rates in a short-period range of 6-20 Hz were obtained using three different methods: the 6C Rotaphone sensor system developed by the authors, the commercial R-1 rotational sensor by Eentec, and a small-aperture array of twelve standard velocigraphs in a rectangular arrangement. Those three methods are compared and discussed in detail. A medium-size quarry blast was used as a seismic source. At a distance of approximately 240 m, the rotation rates reached an amplitude of the order of magnitude of 10(-4)-10(-5) rad/s. The array derived rotation rates displayed serious limitations, as clearly documented. The R-1 instruments have shown certain technical problems that partly limit their applicability. The measured rotation rates were compared to the relevant acceleration components according to rotation-to-translation relations. Out of all the three methods, the records best matching the acceleration components were made by Rotaphone. The experiment also revealed that rotation rates in the given short-period range noticeably changed over a distance as short as 2 m. Pracoviště Ústav struktury a mechaniky hornin Kontakt Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Rok sběru 2022 Elektronická adresa https://www.mdpi.com/1424-8220/20/19/5679
Počet záznamů: 1