Karakterizacija vpliva bitumenske izolacije na vibracijski odziv plošče

Gruden, Andraž (author), Čepon, Gregor (mentor)

Končni izdelki avtomobilske industrije in proizvodnje bele tehnike morajo dosegati stroge standarde glede zahtevanih maksimalnih vibracij in hrupa, kar je neposredno povezano z utrujanjem materiala in udobnostjo uporabe izdelka. V ta namen se za dušenje vibracij pogosto uporablja samolepilna bitumenska izolacija. V okviru zaključne naloge smo okarakterizirali vpliv količine bitumenske izolacije na dinamske lastnosti plošče. Dinamske lastnosti smo določili s postavitvijo numeričnega modela, njegovo natančnost pa smo ovrednotili s postopkom eksperimentalne modalne analize. Analizirali smo različne stopnje prekritosti plošče z bitumensko izolacijo preko frekvenčnih prenosnih funkcij, identificiranih lastnih frekvenc in lastnih oblik, da smo določili najmanjšo potrebno količino prekritosti plošče za doseganje zadostnega dušenja. Ugotovljeno je bilo, da za zadostitev dušenja ne potrebujemo popolno prekrite površine, ampak bi večino dušenja bilo doseženega že pri manjši prekritosti.

• Language: Slovenian
• Keywords: vibracije, dušenje, modalna analiza, frekvenčno prenosna funkcija, bitumenska izolacija, lastna frekvenca
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [A. Gruden]
• Year: 2022
• Number of pages: XIV, 32 f.
• PID: 20.500.12556/RUL-139965
• UDC: 534:519.61:62-415(043.2)
• COBISS.SI-ID: 123845379
• Publication date in RUL: 09.09.2022

GRUDEN, Andraž, 2022, Karakterizacija vpliva bitumenske izolacije na vibracijski odziv plošče [online]. Bachelor’s thesis. Ljubljana : A. Gruden. [Accessed 17 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=139965

Secondary language

• Language: English
• Title: Characterisation of the influence of bituminous insulation on the vibration response of a slab

Abstract

The final products of the automotive industry and the production of white goods must meet strict standards regarding the required maximum vibrations and noise, which is directly related to the fatigue of the material and the comfort of using the product. For this purpose, self-adhesive bitumen insulation is often used to dampen vibrations. As part of the final assignment, we will characterize the influence of the amount of bitumen insulation on the dynamic properties of a slab. The dynamic properties were determined by setting up a numerical model and its accuracy was evaluated by the experimental modal analysis procedure. We analyzed different degrees of coverage of the board with bitumen insulation through frequency response functions, identified eigenfrequencies and eigenshapes, and determined the minimum necessary amount of coverage of the board to achieve sufficient damping. It was found that to satisfy damping, we do not need a completely covered surface, but most of the damping would be achieved even with a smaller coverage.

• Keywords: vibrations, damping, modal analysis, frequency response function, bituminous isolation, natural frequency