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Modeliranje in optimizacija laserskega tvorjenja kapljic iz kovinske žice [Elektronski vir] : doktorsko deloKokalj, Tadej, 1976-Teoretično in eksperimentalno smo raziskali možnost modeliranja in optimizacije procesa laserskega tvorjenja kapljice (LTK) iz kovinske žice. Izdelali smo fizikalni model procesa laserskega tvorjenja ... kapljice. Proces LTK s tremi laserskimi žarki smo obravnavali kot kvazi simetričen in mu prilagodili dvodimenzionalni model. Procesu z enim žarkom smo prilagodili tridimenzionalni model. Numerična obravnava modela omogoča izračun časovnega razvoja temperaturnega polja žice v odvisnosti od parametrov procesa. Izračunano temperaturno polje je podlaga za optimiranje procesa LTK, ki ga obravnavamo v dvah fazah: tvorjenje viseče kapljice in ločitev kapljice od žice. Pri optimiranju smo se omejili na določitev časovnega poteka laserskega bliska. Pri določitvi poteka bliska za tvorjenje viseče kapljice z uporabo treh laserskih žarkov smo uporabili metodo optimiranja z genetskimi algoritmi. Pri določitvi poteka bliska za tvorjenje viseče kapljice z uporabo enega laserskega žarka smo uporabili metodo simulacije krmiljenja v zaprti zanki. Z uporabo numeričnih rešitev smo določili poteke bliska za primer nikljeve žice. Uporabnost izračunanih bliskov smo preverili s preizkusi. Izide preizkusov smo okarakterizirali glede na variabilnost velikosti in lege odloženih kapljic. Potek procesa smo okarakterizirali z analizo signala izsevane svetlobe IR, ki smo ga posneli s hitro kamero IR. Z numerično določenimi poteki laserskih bliskov nam je uspelo zagotoviti uspešno tvorjenje posameznih kapljic in zmanjšati variabilnost procesa. Raziskali smo tudi možnost zaporednega tvorjenja niza kapljic. Rezultati so pokazali, da je optimalen potek laserskega bliska v tem primeru odvisen od predhodnega tvorjenja posameznih kapljic v nizu.Type of material - dissertation ; adult, seriousPublication and manufacture - Ljubljana : [T. Kokalj], 2006Language - slovenianCOBISS.SI-ID - 231218176
Author
Kokalj, Tadej, 1976-
Other authors
Govekar, Edvard |
Grabec, Igor
Topics
tvorjenje kapljice |
laserska obdelava |
modeliranje |
optimizacija |
droplet formation |
laser machining |
modeling |
optimization
Library/institution |
City | Acronym | For loan | Other holdings |
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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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Shelf entry
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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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Kokalj, Tadej, 1976- | 22454 |
Govekar, Edvard | 08782 |
Grabec, Igor | 00800 |
Source: Personal bibliographies
and: SICRIS
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