Karakterizacija vibracij poškodovanega krogličnega ležaja pri spreminjajoči vrtilni frekvenci : doktorsko delo

Faculty of Mechanical Engineering, Lj. (FSLJ)

Karakterizacija vibracij poškodovanega krogličnega ležaja pri spreminjajoči vrtilni frekvenci : doktorsko delo

Tadina, Matej, 1981-

Delo 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

Publication and manufacture - Ljubljana : [M. Tadina], 2012

Language - slovenian

COBISS.SI-ID - 262008064

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Tadina, Matej, 1981-

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Dr TADINA M. Karakterizacija IN: 00057477	available - reading room

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Year	Impact factor		Edition		Category		Classification
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Links to authors' personal bibliographies	Links to information on researchers in the SICRIS system
Tadina, Matej, 1981-	27648
Boltežar, Miha	02034

Source: Personal bibliographies and: SICRIS

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