Vibroakustična analiza plošče

Kljun, Gregor (author), Čepon, Gregor (mentor)

Mirno in tiho delovanje sodobnih izdelkov je bistvenega pomena za dolgo življenjsko dobo ter zadovoljstvo uporabnikov. Pomembna koraka razvojnega postopka novega izdelka tako predstavljata modalna in vibroakustična analiza, njuni rezultati pa morajo zadostiti predpisanim ciljnim specifikacijam. V okviru zaključne naloge smo na primeru ploščate laboratorijske strukture z meritvijo vzbujevalne sile in odzivnega pospeška ter zvočnega tlaka naredili eksperimentalni model. Njegovo natančnost smo analizirali preko primerjav frekvenčno prenosnih funkcij in lastnih oblik s pripadajočim numeričnim modelom ter poiskali vzroke za odstopanja. Vzporedna primerjava eksperimentalnih in numeričnih rezultatov je dokazala ustreznost obeh modelov.

• Language: Slovenian
• Keywords: metoda končnih elementov, modalna analiza, harmonska analiza, tehnična akustika, vibroakustika
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [G. Kljun]
• Year: 2021
• Number of pages: XV, 52 str.
• PID: 20.500.12556/RUL-128801
• UDC: 534.6:519.6:628.517(043.2)
• COBISS.SI-ID: 72980483
• Publication date in RUL: 30.07.2021

KLJUN, Gregor, 2021, Vibroakustična analiza plošče [online]. Bachelor’s thesis. Ljubljana : G. Kljun. [Accessed 7 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=128801

Secondary language

• Language: English
• Title: Vibroacustic analysis of plate

Abstract

The calm and quiet operation of modern products is essential for a long service life and user satisfaction. Important steps in the development process of a new product are modal and vibroacoustic analysis, and their results must meet the prescribed target specifications. As part of the diploma thesis, we made an experimental model on the example of a flat laboratory structure by measuring the excitation force and the response acceleration and sound pressure. Its accuracy was analyzed through comparisons of frequency response functions and mode shapes with the corresponding numerical model and the causes of deviations were found. A parallel comparison of experimental and numerical results proved the adequacy of both models.

• Keywords: finite element method, modal analysis, harmonic analysis, technical acoustics, vibroacoustics