Vrednotenje razvojnih rešitev pasivnih komponent aktivno vzbujanih struktur z metodologijo analize prenosnih poti

magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Maksim Oblišar (Author), Gregor Čepon (Mentor)

Abstract

V prizadevanju za ustvarjanje mirnejšega bivalnega okolja se v segmentu gospodinjskih hladilnih aparatov postavljajo vedno višji standardi glede dovoljene ravni vibracij in hrupa. Hladilni aparat je izpostavljen številnim virom vzbujanja med katerimi najizrazitejšega predstavlja kompresor hladilnega prostora. Od kompresorja se hrup in vibracije prenašajo do uporabnika po strukturnih in akustičnih prenosnih poteh. Zmanjšanje prenosa vibracij in hrupa je izvedeno s pomočjo vibroizolacij, ki povezujejo kompresor s preostalim delom hladilnega aparata. Predstavljen pristop vrednotenja ustreznosti vibroizolacij temelji na metodah analize prenosnih poti. Slednje so namenjene karakterizaciji vzbujevalnega vira, ki ga s pomočjo neposredne eksperimentalne ali numerične karakterizacije, zaradi njegove kompleksnosti, ni možno izvesti. Metoda predvidi znan nabor sil, s katerimi posredno repliciramo odziv na strukturi,ki je sicer posledica aktivnega vzbujanja zaradi delovanja kompresorja. Nabor sil v nadaljevanju uporabimo za napoved odziva sklopa identičnega vzbujevalnega vira in virtualno modificiranih vibroizolacijskih elementov. Na podlagi vrednotenja odziva ob uporabi virtualno modificiranih vibroizolacijskih elementov je v delu predstavljen postopek zasnove novega koncepta vibroizolacij, ki omogoča učinkovito zmanjšanje prenosa vibracij in hrupa iz kompresorja na preostale dele hladilnega aparata.

Keywords

magistrske naloge;vibroizolacija;hladilni aparat;kompresor;analiza prenosnih poti;podstrukturiranje;numerični model;

Data

Language:	Slovenian
Year of publishing:	2023
Typology:	2.09 - Master's Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[M. Oblišar]
UDC:	691:699.844(043.2)
COBISS:	164932355
Views:	38
Downloads:	9
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Evaluation of development solutions for passive components in actively excited structures using transfer path analysis framework
Secondary abstract:	In the pursuit of creating a quieter living environment, increasingly higher standards are being set in the segment of household refrigeration appliances regarding the permissible levels of vibrations and noise. A standard cooling appliance is exposed to numerous sources of excitation, with the compressor being the most prominent one. Noise and vibrations that originate from the compressor are transmitted to the user through structural and acoustic transfer paths. Reduction of vibration and noise transmission is achieved through the use of vibroisolations that connect the compressor to the remaining parts of the cooling appliance. An approach for evaluating the adequacy of vibroisolations is based on the methods of transfer path analysis. The method aims to characterize the excitation source, which cannot be directly experimentally or numerically characterized due to its complexity. The method predicts a known set of forces that indirectly replicate the response of the structure, which is otherwise a result of active excitation caused by the compressor operation. The set of forces is then used to predict the response of an assembly with an identical excitation source and virtually modified vibration isolation elements. Based on the evaluation of the response using the virtually modified vibration isolation elements, a design of a new concept of vibration isolators is developed, allowing for effective reduction of vibration and noise transmission from the compressor to the remaining parts of the cooling appliance.
Secondary keywords:	master thesis;vibroisolations;cooling appliance;compressor;transfer path analysis;frequency-based substructuring;numerical model;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. Ljubljana, Fak. za strojništvo
Pages:	XXII, 80 str.
ID:	19849291