Vpliv dušenja z delci na dinamski odziv plošče

Bogolin, Maks (author), Česnik, Martin (mentor)

V delu je predstavljen princip dušenja z delci na primeru konzolno vpete plošče. Zasnovana je bila konstrukcija, ki je bila tudi numerično validirana. Postavljen je eksperiment, kjer se je iz večjega števila merilnih mest na plošči pridobilo njene lastne oblike. V nadaljevanju je raziskan vpliv dušenja z delci na dinamski odziv konstrukcije. Uporabi se delce dveh vrst v različnih konfiguracijah na plošči. Meritve, pridobljene z laserskim vibrometrom, so obdelane z odprto-kodnim paketom za modalno analizo PyEMA, ki nam poda razmernike dušenja za opazovane lastne oblike. Iz rezultatov je razvidno, da je najbolj izrazito dušena prva lastna frekvenca plošče, ne glede na konfiguracijo in uporabljene delce. Plastični delci se izkažejo za rahlo boljše dušilno sredstvo kot so gumijasti delci.

• Language: Slovenian
• Keywords: dušenje z delci, modalna analiza, dinamski odziv, tanka plošča, modalne lastnosti
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Bogolin]
• Year: 2023
• Number of pages: XII, 26 str.
• PID: 20.500.12556/RUL-149016
• UDC: 539.67:510.643.5:519.62(043.2)
• COBISS.SI-ID: 164627203
• Publication date in RUL: 02.09.2023

BOGOLIN, Maks, 2023, Vpliv dušenja z delci na dinamski odziv plošče [online]. Bachelor’s thesis. Ljubljana : M. Bogolin] . [Accessed 17 May 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=149016

Secondary language

• Language: English
• Title: Particle-damping of the dynamically excited plate

Abstract

The principle of damping with particles is presented in the work using the example of a fully clamped plate. A design was created and numerically validated. An experiment was set up where plates natural modes were obtained from a larger number of measurement points. Subsequently, the influence of particle damping on the dynamic response of the structure was explored. Two types of particles were used in different configurations on the plate. Measurements obtained with a laser vibrometer were processed using the open-source package PyEMA for modal analysis, which provided us with damping coefficients for observed natural modes. The results show that the first natural frequency of the plate was most significantly damped, regardless of the configuration and type of particles used. Plastic particles prove to be slightly better damping agents than rubber particles.

• Keywords: particle damping, modal analysis, dynamic response, thin plate, modal properties