| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document

Title:RAZVOJ MATEMATIČNEGA MODELA TRENJA ZA SIMULACIJO DINAMIKE TORNE SKLOPKE V SISTEMU TELES
Authors:Petrun, Tomaž (Author)
Flašker, Jože (Mentor) More about this mentor... New window
Kegl, Marko (Co-mentor)
Files:.pdf DR_Petrun_Tomaz_2013.pdf (12,03 MB)
 
Language:Slovenian
Work type:Dissertation (m)
Organization:FS - Faculty of Mechanical Engineering
Abstract:Doktorska disertacija obravnava razvoj in validacijo modela trenja za uporabo v modelu popolnoma funkcionalne torne sklopke v programskem paketu AVL EXCITE, ki bo omogočal numerične simulacije dinamike sistema teles celotnega pogonskega sklopa. Na podlagi zahtev ciljnega programskega paketa za implementacijo in zahtev, ki izhajajo iz aplikacije in pregleda obstoječe literature, je bil izbran elasto-plastični model trenja kot najprimernejši model za nadaljnjo raziskovalno delo. S pomočjo numeričnih testov je bilo ugotovljeno, da izbran model ne ustreza zahtevam dane aplikacije zaradi nezveznosti modela za določene naključne kombinacije parametrov modela in vhodnih podatkov. Zaradi tega je bila narejena modifikacija elasto-plastičnega modela trenja, ki je odpravila pomanjkljivosti. Razvit modificiran elasto-plastični model je bil validiran na podlagi eksperimentalnih meritev. Za izvedbo eksperimentalnih meritev je bila izdelana posebna merilna proga s poenostavljeno torno sklopko. Merilna proga omogoča meritve prenesenega vrtilnega momenta, normalne sile in vrtilnih hitrosti pod obratovalnimi pogoji, ki se zelo približajo realnim obratovalnim pogojem v pogonskem sklopu z motorjem z notranjim zgorevanjem. Primerjava rezultatov eksperimentalnih meritev in pripadajočih numeričnih simulacij sistema teles z uporabo razvitega modificiranega elasto-plastičnega modela trenja v modelu popolnoma funkcionalne torne sklopke je pokazala zelo dobro ujemanje. Ugotovljeno je bilo, da je razvit modificiran elasto-plastični model trenja sposoben pravilno opisati vse obratovalne faze torne sklopke. Model je sposoben zvezno izračunati količino dejansko prenesenega vrtilnega momenta v vseh obratovalnih fazah torne sklopke. Model je tudi sposoben pravilno upoštevati inducirane dinamične pojave zaradi trenja, kot je na primer "stick/slip" pojav. Razvit modificiran elasto-plastični model trenja ustreza vsem podanim zahtevam za dano aplikacijo in vsem zahtevam za implementacijo v ciljni programski paket.
Keywords:modificiran elasto-plastični model trenja, torna sklopka, validacija, eksperimentalne meritve, dinamika sistema teles
Year of publishing:2013
Publisher:T. Petrun]
Source:[Maribor
UDC:621.8
COBISS_ID:267410688 Link is opened in a new window
NUK URN:URN:SI:UM:DK:OM0MQ7T2
Views:1287
Downloads:193
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FS
:
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:AddThis
AddThis uses cookies that require your consent. Edit consent...

Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Secondary language

Language:English
Title:DEVELOPMENT OF MATHEMATICAL FRICTION MODEL FOR THE SIMULATION OF FRICTION CLUTCH DYNAMICS IN A MULTI-BODY SYSTEM
Abstract:The given PhD thesis deals with the development and validation of a friction model to be used in a fully functional friction clutch model within the software package AVL EXCITE for numerical analyses of multi-body dynamics of a complete powertrain. Considering the demand and requirements of the target software, application and literature review the elasto-plastic friction model was chosen as the most appropriate to be investigated further. With help of numerical tests it was discovered, that the chosen friction model cannot fulfil the given requirements and demands, since it becomes discontinuous for some coincidental combinations of model parameters and input data. For this reason a modification of the elasto-plastic friction model has been carried out. The developed modified elasto-plastic friction model was validated against experimental measurements performed on a special test bed with a simplified friction clutch built especially for this purpose. The test bed enabled for acquisition of transmitted torques, angular velocities and normal force under operational conditions similar to those in a complete powertrain including an internal combustion engine. Result comparison between measurements and corresponding numerical multi-body simulations using the developed friction model showed reasonably good agreement. It has been discovered that the developed modified elasto-plastic friction model can correctly predict all friction clutch operation phases. It can provide the exact values of actually transmitted friction torque continuously. It can also render friction induced dynamics, for example the stick/slip effect. The developed model meets all requirements and demands of the application and fulfils the objectives of the target software.
Keywords:modified elasto-plastic friction model, friction clutch, validation, experimental measurements, multi-body system dynamics


Comments

Leave comment

You have to log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica