Počet záznamů: 1
Computational Time reversal: localization of cracks
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SYSNO ASEP 0518663 Druh ASEP A - Abstrakt Zařazení RIV O - Ostatní Název Computational Time reversal: localization of cracks Tvůrce(i) Mračko, Michal (UT-L)
Kolman, Radek (UT-L) RID
Kober, Jan (UT-L) RID, ORCID
Převorovský, Zdeněk (UT-L) RID
Plešek, Jiří (UT-L) RID, ORCID, SAICelkový počet autorů 5 Zdroj.dok. Modelling 2019, Book of absracts. - Ostrava : Institute of Geonics of the Czech Academy of Sciences, 2019 / Blaheta R. ; Starý J. ; Sysala S. - ISBN 978-80-86407-79-1
S. 143-143Poč.str. 1 s. Forma vydání Tištěná - P Akce Modelling 2019: International conference on mathematical modelling and computational methods in applied sciences and engineering Datum konání 16.09.2019 - 20.09.2019 Místo konání Olomouc Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova time reversal ; refocusing ; elastic wave propagation Vědní obor RIV BI - Akustika a kmity Obor OECD Mechanical engineering CEP EF15_003/0000493 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA17-22615S GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 Anotace There are several fields where Time reversal (TR) method has found its application. Our object of interest is the application in ultrasonic non-destructive testing (NDT). In NDT, this method can be used for tracing the source of vibrations in solid bodies, the source being a crack or some other defect, using a backward wave propagation for refocusing of the original source. The computational TR process consists of two steps. In the first step - the Frontal task, a model is loaded at the given place with the defined loading signal and an output is recorded at some location. In the second step
- the Reverse task, this responding signal is reversed in time and loaded back into the model so as to locate the original source (e.g. crack). Here we focus on localization of an initializing and a propagating crack in the prestressed finite element (FE) model. Besides other things, we also study how the length of the computation (number of reections of the elastic waves) in uences the
probability of localization of the crack. For numerical solution, we use the linear FE method, explicit integration in time.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 2020
Počet záznamů: 1