Dinamično sklapljanje struktur v frekvenčni domeni

magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Miha Kodrič (Author), Gregor Čepon (Mentor), Miha Boltežar (Co-mentor)

Abstract

Zaradi tendence z vidika časovne optimizacije, razvoj strmi k uporabi naprednih metod, kot tudi eliminaciji redundantnih razvojnih korakov. Iz tega razloga pristopi numeričnega modeliranja kompleksnih struktur na vseh nivojih strmijo k razvoju metod dinamičnega sklapljanja podstruktur. Te omogočajo nepovezano analizo podsistemov ter njihovo združevanje v celotno strukturo sistema. Glede na predstavljeno je tendenca razvoja usmerjena v nadgradnjo eksperimentalnih metod sklapljanja v smeri povečanja robustnosti in uporabnosti. Ključen napredek na tem področju predstavlja razvoj t.i. hibridne metode sklapljanja, ki hkrati privzame robustnost ter učinkovitost numeričnih metod dinamskega sklapljanja kot tudi realne dinamske parametre sistema preko eksperimentalnih metod dinamskega sklapljanja. V okviru magistrske naloge je predstavljena nadgradnja uveljavljene hibridne metode kombiniranja ekvivalentnih modelov. Preko razvoja kriterijev za identifikacijo in izločanja t.i. slabih meritev je izveden velik napredek v smeri povečanja robustnosti in uporabnosti metode. Prikazan je postopek, kjer se t.i. slabe meritve nadomešča z rekonstruiranimi frekvenčno prenosnimi funkcijami z uporabo metod razširjanja in implementacije numeričnega modela. Končno je izvedena primerjava razvite metode z obstoječo metodo kombiniranja ekvivalentnih modelov na primeru sklapljanja dveh delov nosilca.

Keywords

magistrske naloge;podstrukturiranje;dinamično sklapljanje;podstrukturiranje v frekvenčni domeni;hibridni model;SEMM;

Data

Language:	Slovenian
Year of publishing:	2018
Typology:	2.09 - Master's Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[M. Kodrič]
UDC:	004.42:519.61(043.2)
COBISS:	16391195
Views:	1632
Downloads:	427
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Dynamic coupling in Frequency Domain
Secondary abstract:	In recent time the research in the field of mechanical engineering in focused towards the development of advanced time-optimized numerical methods. For this reason, the modeling approaches within structural dynamics are orientated towards the use of modern substructuring techniques. According to the presented issues, the tendency in the field of experimental dynamic substructuring is to develop a more efficient, robust and practical methods. The majority of the development is therefore orientated towards the development of a hybrid-substructuring methods. This kind of methods combine efficiency and robustness of the numerical dynamics substructuring methods and the real-system properties though the experimental dynamics substructuring methods. In this thesis the extension of well-established hybrid method called System Equivalent Model Mixing in presented. By developing the criterions for identification of so called bad measurements the major improvement in the sense of applicability and robustness of the method is presented. The method enables the reconstruction of frequency response functions associated with bad measurements using the expansion techniques by considering the consistency of numerical model. Finally, the comparison of developed method is presented with basic system equivalent model mixing formulation by coupling two identical beams.
Secondary keywords:	substructuring;dynamic coupling;frequency based substructuring;hybrid model;SEMM;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. Ljubljana, Fak. za strojništvo
Pages:	XXIV, 62 str.
ID:	10957155