Eksperimentalna implementacija metod analize prenosnih poti

magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Domen Kocbek (Author), Gregor Čepon (Mentor)

Abstract

Obvladovanje vibroakustičnih lastnosti predstavlja pomemben del razvojnega procesa v fazi načrtovanja visokotehnoloških izdelkov. Zasnova izdelkov postaja vse bolj modularna, zato se razvojni inženirji poslužujejo uporabe naprednih segmentnih metod za napovedovanje odziva končnega sestava. Analiza prenosnih poti omogoča vrednotenje hrupnosti in vibracijskega odziva na osnovi sintetičnega nabora sil, s katerimi repliciramo dejanske sile med obratovanjem sistema. V delu so predstavljene uveljavljene tehnike za uspešno eksperimentalno implementacijo metod analize prenosnih poti; orodja za validacijo ustrezne nadzorovanosti in opazovanosti kontakta, orodja za identifikacijo slabe pogojenosti admitančnih matrik, uporabo redukcijskih tehnik za zagotavljanje linearno neodvisnega nabora sil in regularizacijske tehnike za minimiziranje vpliva šuma na izračunan nabor sil. Sočasno je okarakterizirana linearna odvisnost izračunanega nabora sil, vpliv predoločenosti inverznega problema in vpliv ranga admitančne matrike. Predstavljena metodologija je demonstrirana na primeru laboratorijske strukture sestavljene iz dveh podstruktur, ki sta bili med seboj povezani z gumijastimi spoji.

Keywords

magistrske naloge;analiza prenosnih poti;trasformacija virtualne točke;regularizacija;metode ekvivalentnih sil;sklapljanje podstruktur;

Data

Language:	Slovenian
Year of publishing:	2023
Typology:	2.09 - Master's Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[D. Kocbek]
UDC:	531.3:534.1:539.433(043.2)
COBISS:	164910339
Views:	47
Downloads:	17
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Experimental implementation of Transfer Path Analysis
Secondary abstract:	At the high-tech product design stage, one of the crucial steps represents the vibroacoustic optimization analyses. The modular structure concept is becoming more and more important in product development area. For that reason the most advanced segmental methods are often used for predicting the structure response. The transfer path analysis method enables the evaluation of sound and vibration response of the system based on synthetic collection of forces substituting the real forces at real operation. In this thesis the commonly used techniques for efficient experimental implementation of the transfer path methods are presented together with means needed for appropriate validation of controllability and observability of the contact methods for identifying poorly conditioned admittance matrix, reduction techniques to provide the collection of linearly independent forces and regularization techniques for minimizing the noise influence on the calculated forces. At the same time, the linear dependence of the calculated forces, the influence of an overdeterminacy on the inverse problem and the influence of admittance matrix rank are characterised. The methodology presented in this thesis was demonstrated on a laboratory structure assembled of two substructures coupled by rubber joints.
Secondary keywords:	master thesis;transfet path analysis;virtual point transformation;regularization;equivalent forces methods;substructuring;
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, 59 str.
ID:	19849282