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Verjetnostna analiza dinamskega odziva elementov z utrujenostno razpoko
ID
Murnc, Luka
(
Author
),
ID
Česnik, Martin
(
Mentor
)
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Abstract
V zaključni nalogi je predstavljena metoda za kvantitativno vrednotenje utrujenostnih razpok z verjetnostnega vidika, ki temelji na zaznavanju šibkih nelinearnosti v dinamskem odzivu. S sintetičnim eksperimentom je bil obravnavan model z eno prostostno stopnjo, ki replicira realno poškodovano strukturo. Njegov dinamski odziv je bil analiziran z metodo verjetnostne analize. Sledil je realni eksperiment na enostavnem nosilcu, čigar signal je bil analiziran z verjetnostno metodo pred in po utrujenostni poškodbi. Eksperimenti so pokazali, da dinamski odziv v podresonančnem območju vsebuje več nelinearnosti.
Language:
Slovenian
Keywords:
utrujenostna razpoka
,
nelinearni dinamski odziv
,
enojna spektralna analiza
,
značilnost stanja
,
kvantitativna evalvacija
Work type:
Final paper
Typology:
2.11 - Undergraduate Thesis
Organization:
FS - Faculty of Mechanical Engineering
Place of publishing:
Ljubljana
Publisher:
[L. Murnc]
Year:
2023
Number of pages:
XI, 32 str.
PID:
20.500.12556/RUL-148974
UDC:
531.391:538.913:620.178.3(043.2)
COBISS.SI-ID:
164635395
Publication date in RUL:
02.09.2023
Views:
969
Downloads:
49
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MURNC, Luka, 2023,
Verjetnostna analiza dinamskega odziva elementov z utrujenostno razpoko
[online]. Bachelor’s thesis. Ljubljana : L. Murnc. [Accessed 17 May 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=148974
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Language:
English
Title:
Probabilistic analysis of dynamic responses of structures with fatigue crack
Abstract:
This thesis presents a method for the quantitative evaluation of fatigue cracks from a probabilistic view based on the detection of weak nonlinearities in the dynamic response. The synthetic experiment considered a model with a single degree of freedom, which resembles the behaviour of a real damaged structure. Its dynamic response was analysed with the probabilistic method. This was followed by a real experiment on a simple beam, whose signal was analysed before and after a fatigue crack was induced. The experiments have shown that the dynamic response contains more nonlinearities in the subresonance region.
Keywords:
fatigue crack
,
nonlinear dynamic response
,
singular spectrum analysis
,
status feature
,
quantitative evaluation
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