Optimalizace tvaru mazací mezery hydrodynamického ložiska

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but.committeeprof. RNDr. Josef Šlapal, CSc. (předseda) prof. RNDr. Miloslav Druckmüller, CSc. (místopředseda) doc. Ing. Luděk Nechvátal, Ph.D. (člen) doc. Mgr. Zuzana Hübnerová, Ph.D. (člen) prof. Mgr. Pavel Řehák, Ph.D. (člen) prof. Bruno Rubino (člen) prof. Matteo Colangeli (člen) prof. Vladimir Protasov (člen)cs
but.defenceThe student introduced his diploma thesis to the committee members and explained the fundamentals of his topic called Lubricant Gap Shape Optimization of the Hydrodynamic Thrust Bearing. The supervisor Novotný read the review and he read the opponent's review, too. The student's reaction to the supervisor's and opponent's review was incorrect. He didn't explained sufficiently the problematic parts of his thesis. He described only his critical point of view of communication with the supervisor. The committee's question: Hubnerova: Why didn't you use a different method for solving this problem according the supervisor's suggestion? - the question was not answeredcs
but.jazykangličtina (English)
but.programAplikované vědy v inženýrstvícs
but.resultpráce nebyla úspěšně obhájenacs
dc.contributor.advisorNovotný, Pavelen
dc.contributor.authorOchulo, Ikechien
dc.contributor.refereeVacula, Jiříen
dc.date.created2021cs
dc.description.abstractThe objective of this Master's thesis is to find, using genetic algorithm (GA), an optimal profile for lubricating gap of a thrust bearing of a turbocharger. Compared to the analytical profile, the optimal profile is expected to have minimized friction for an equivalent load capacity. Friction minimization is one way to increase the efficiency of the thrust bearing; it reduces the friction losses in the bearing. An initial problem was given: a thrust bearing with Load capacity 1000 N, inner and outer radii of 30mm and 60mm respectively, rotor speed of 45000 rpm and angle of running surface of $0.5^0$. Lubricant properties were also provided for the initial problem: oil density of $ 840 kg/m^3$, dynamic viscosity $(\eta)$ of 0.01 Pa.s With this data, the numerical solution of the Reynolds equation was computed using MATLAB. To obtain more information, the minimum lubricating gap thickness was also computed using MATLAB. With this information, the shape of the analytical profile, and its characteristics were found. The analytical profile was then used a guide to create a general profile. The general profile thus obtained is then optimized using GA. The characteristics of the generated profile is then computed and compared to that of the analytical profile.en
dc.description.abstractThe objective of this Master's thesis is to find, using genetic algorithm (GA), an optimal profile for lubricating gap of a thrust bearing of a turbocharger. Compared to the analytical profile, the optimal profile is expected to have minimized friction for an equivalent load capacity. Friction minimization is one way to increase the efficiency of the thrust bearing; it reduces the friction losses in the bearing. An initial problem was given: a thrust bearing with Load capacity 1000 N, inner and outer radii of 30mm and 60mm respectively, rotor speed of 45000 rpm and angle of running surface of $0.5^0$. Lubricant properties were also provided for the initial problem: oil density of $ 840 kg/m^3$, dynamic viscosity $(\eta)$ of 0.01 Pa.s With this data, the numerical solution of the Reynolds equation was computed using MATLAB. To obtain more information, the minimum lubricating gap thickness was also computed using MATLAB. With this information, the shape of the analytical profile, and its characteristics were found. The analytical profile was then used a guide to create a general profile. The general profile thus obtained is then optimized using GA. The characteristics of the generated profile is then computed and compared to that of the analytical profile.cs
dc.description.markFcs
dc.identifier.citationOCHULO, I. Optimalizace tvaru mazací mezery hydrodynamického ložiska [online]. Brno: Vysoké učení technické v Brně. Fakulta strojního inženýrství. 2021.cs
dc.identifier.other137282cs
dc.identifier.urihttp://hdl.handle.net/11012/201679
dc.language.isoencs
dc.publisherVysoké učení technické v Brně. Fakulta strojního inženýrstvícs
dc.rightsStandardní licenční smlouva - přístup k plnému textu bez omezenícs
dc.subjectShape Optimizationen
dc.subjectGenetic algorithmen
dc.subjectThrust bearingen
dc.subjectLubricationen
dc.subjectTurbochargeren
dc.subjectShape Optimizationcs
dc.subjectGenetic algorithmcs
dc.subjectThrust bearingcs
dc.subjectLubricationcs
dc.subjectTurbochargercs
dc.titleOptimalizace tvaru mazací mezery hydrodynamického ložiskaen
dc.title.alternativeLubricant Gap Shape Optimization of the Hydrodynamic Thrust Bearingcs
dc.typeTextcs
dc.type.drivermasterThesisen
dc.type.evskpdiplomová prácecs
dcterms.dateAccepted2021-09-29cs
dcterms.modified2022-05-19-14:28:58cs
eprints.affiliatedInstitution.facultyFakulta strojního inženýrstvícs
sync.item.dbid137282en
sync.item.dbtypeZPen
sync.item.insts2025.03.27 10:35:06en
sync.item.modts2025.01.17 12:48:49en
thesis.disciplineMatematické inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav matematikycs
thesis.levelInženýrskýcs
thesis.nameIng.cs
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