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Karakterizacija vibracij poškodovanega krogličnega ležaja pri spreminjajoči vrtilni frekvenci : doktorsko deloTadina, Matej, 1981-, strojništvoDelo obravnava izboljšan matematični model enorednega krogličnega ležaja s poškodbami za simuliranje vibracij, ki se pojavijo pri zagonu. V razvitem numeričnem modelu ležaja je predpostavljeno, da ... ima notranji obroč le dve prostostni stopnji, zunanji obroč pa je prožen v radialni smeri. Zunanji obročje modeliran v sklopu teorije končnih elementov in zanj je uporabljen ukrivljeni končni element. V modelu je upoštevana centrifugalna sila na na kroglice in radiaIna zračnost ležaja. Kontaktne razmere so modelirane v sklopu Hertzeve kontaktne teorije. V modelu so upoštevane lokalne poškodbe na tekalnih površinah ležaja. Geometrija poškodb na notranjem in zunanjem obroču je popisana z Gaussovo funkcijo, medtem ko je na poškodba kroglice modelirana s krogelnim odsekom. Razviti model ležaja je uporabljen za simuliranje vibracij točkovno poškodovanih ležajev pri zagonu. Na osnovi simuliranih signalov so izbrani primerni parametri za metodo ovojnice in Hilbert-Huangovo transformacijo za identifikacijo napak na ležajih. S tako določenimi parametri sta metodi validirani na eksperimentalno pomerjenih vibracijah poškodovanih ležajev.Type of material - dissertation ; adult, seriousPublication and manufacture - Ljubljana : [M. Tadina], 2012Language - slovenianCOBISS.SI-ID - 262008064
Author
Tadina, Matej, strojništvo, 1981-
Other authors
Boltežar, Miha
Topics
Kroglični ležaji |
Poškodbe |
Disertacije |
mehanika |
strukturne vibracije |
modeliranje |
lokalne poškodbe |
analiza signalov |
metoda ovojnice |
Hilbert-Huangova transformacija |
poskusi |
validacija
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Library/institution |
City | Acronym | For loan | Other holdings |
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Faculty of Mechanical Engineering, Ljubljana | Ljubljana | FSLJ |
reading room 1 cop.
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National and University Library, Ljubljana | Ljubljana | NUK |
reading room 1 cop.
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not for loan 1 cop.
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Tadina, Matej, strojništvo, 1981- | 27648 |
Boltežar, Miha | 02034 |
Source: Personal bibliographies
and: SICRIS
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