Vibroakustična analiza sklopljenega Helmholtzovega resonatorja v kapljevinskem mediju : doktorsko delo

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Vibroakustična analiza sklopljenega Helmholtzovega resonatorja v kapljevinskem mediju : doktorsko delo

Oblak, Miša

Doktorsko delo obravnava sklopljen Helmholtzov resonator v kapljevinskem mediju v nizkofrekvenčnem območju. Sklopljen vibroakustičen problem zajema interakcijo med fluidom in strukturo ter ... interakcijo med akustičnimi votlinami. Za popis interakcije med prožnim Helmholtzovim resonatorjem in akustično votlino je razvit analitičen model s pristopom modalnega sklapljanja. Pri tem je napoved odziva tlačnega polja ob nezveznih prehodih geometrije izboljšana na podlagi nove formulacije izginjajočih valov. Predlagan model je razširjen z lastno dinamiko sklopljene plošče za upoštevanje interakcije med strukturo in zunanjim akustičnim poljem. Nadalje so v model implementirani mehanizmi disipacije v fluidu in strukturno dušenje. Za namen eksperimentalne validacije je zasnovana impedančna cev za merjenje disipacije v kapljevinskem mediju v nizkofrekvenčnem območju ter razvita metodologija za identifikacijo zvočne hitrosti in atenuacije. Absorpcijski koeficienti testnih Helmholtzovih resonatorjev izkazujejo dobro ujemanje med modelom in meritvami. Napoved odziva s predlaganim modelom je bolj točna od analize MKE.

Type of material - dissertation ; adult, serious

Publication and manufacture - Ljubljana : [M. Oblak], 2023

Language - slovenian

COBISS.SI-ID - 155464963

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Oblak, Miša

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Boltežar, Miha

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Oblak, Miša
Boltežar, Miha	02034

Source: Personal bibliographies and: SICRIS

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