Mittelineaarse lainelevi uurimisrühm
Uurimisrühma juht
Seotud struktuuriüksus
TalTech prioriteetne teadussuund
Ülevaade
Tegevus on fokusseeritud komplekssetes keskkondades toimuva lainelevi seaduspärasuste selgitamisele. Peamised uurimissuunad on:• Pideva keskkonna mehaanika ja sisemuutujate teooria. Loodavad matemaatilised mudelid võtavad arvesse mittelineaarseid, dispersiivseid ning temperatuuri efekte ja erineva skaalaga mikrostruktuuride koosmõju lainelevile.• Mittelineaarse lainelevi numbriline analüüs. Keerukate lainestruktuuride käitumise uurimiseks luuakse Fourier’ teisendusel ja Haari lainikutel põhinevaid numbrilisi meetodeid.• Metamaterjalide modelleerimine. Luuakse teoreetilist baasi uute tehismaterjalide loomiseks.• Laineprotsessid aksonites. Selgitatakse närvisignaali levikuga kaasnevaid mehaanilisi ja termilisi efekte.• Muusika akustika. Mittelineaarsete mudelite abil selgitatakse helitekke mehhanisme keelpillides.• Materjalide mittepurustav testimine. Luuakse meetodeid komplekssete materjalide omaduste määramiseks ja defektide tuvastamiseks.• Solitonide ja üksiklainete analüüs. Selgitatakse mis tingimustel saavad komplekssetes keskkondades formeeruda solitoni tüüpi lained.
Uurimisrühma liige
Doktorant
Klassifikaator (Frascati)
Võtmesõna
sisemuutujate teooria
mittelineaarsed lained
solitonid
mittepurustav testimine
laineprotsessid aksonites
heliteke keelpillides
metamaterjalid
numbrilised eksperimendid
Tähtsamad tulemused
2023. a tulemusi:• Närviimpulsi levi modelleerimine. Jätkus närvisignaali mudeli täiustamine ja vastavate numbriliste eksperimentide teostamine. Viidi lõpulemüeliinikihi mõju lisamine mudeli mehaanikalisele osale.• Metamaterjalide modelleerimine ja sisemuutujate teooria. Jätkusid uuringud, kus rakendati topelt sisemuutujate formalismi elastsete materjalide olekumudelite (olekuvõrrandite) tuletamiseks. • Keelpillide helitekke mehhanism. Jätkati tööd teemal, mis on seotud võnkuva keele ergastamisega lokaliseeritud löögi ja muude ergastusviiside abil.• Lainelevi viskoelastsetes materjalides. Selgitati keelutsooni ja negatiivse grupikiiruse füüsikalist tähendust vildi-tüüpi viskoelastsetes materjalides.
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https://doi.org/10.3389/fncel.2023.1222785