Počet záznamů: 1
Finite element method based computational time reversal in elastodynamics: Refocusing, reconstruction and its numerical sensitivity
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SYSNO ASEP 0535460 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Finite element method based computational time reversal in elastodynamics: Refocusing, reconstruction and its numerical sensitivity Tvůrce(i) Mračko, Michal (UT-L)
Kober, Jan (UT-L) RID, ORCID
Kolman, Radek (UT-L) RID
Převorovský, Zdeněk (UT-L) RID
Tkachuk, A. (DE)
Plešek, Jiří (UT-L) RID, ORCID, SAICelkový počet autorů 6 Zdroj.dok. Mathematics and Computers in Simulation. - : Elsevier - ISSN 0378-4754
Roč. 189, November (2021), s. 163-192Poč.str. 34 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova time reversal ; nondestructive testing ; elastic wave propagation ; localization ; refocusing ; reconstruction ; explicit finite element method Vědní obor RIV BI - Akustika a kmity Obor OECD Mechanical engineering CEP GA17-22615S GA ČR - Grantová agentura ČR EF15_003/0000493 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UT-L - RVO:61388998 UT WOS 000683684700014 EID SCOPUS 85097457964 DOI 10.1016/j.matcom.2020.11.004 Anotace In this paper, we study the accuracy and robustness of the computational time reversal approach based on the explicit finite element method for application in nondestructive testing in solids. The main goal of this paper is to find a methodology for correct and accurate reconstruction of the original source time history. For numerical modeling of frontal (forward) and reverse
(backward) problems of elastic wave propagation, we use the finite element method and explicit time integration with the lumped mass matrix. The suggested methodology is applicable in each finite element open source or commercial software. A special attention is paid to prescription of boundary conditions/loading for the reverse problem for accurate reconstruction of time history of the original source. For evaluation of the reconstruction quality, we suggest certain cost functions. Based on several numerical tests, we show effects of prescription of boundary conditions/loading in time reversal, effect of mesh size and time step size, an unknown obstacle, a number of sources, and environmental disturbance (noise) on the correctness of reconstruction of the original source.Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2022 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0378475420303979?via%3Dihub
Počet záznamů: 1