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professional thesis
Analiza zamora krajnje polne ploče sinkronog hidrogeneratora
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2014. urn:nbn:hr:235:261534
Bonačić, Filip
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Bonačić, F. (2014). Analiza zamora krajnje polne ploče sinkronog hidrogeneratora (Professional thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:261534

Bonačić, Filip. "Analiza zamora krajnje polne ploče sinkronog hidrogeneratora." Professional thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2014. https://urn.nsk.hr/urn:nbn:hr:235:261534

Bonačić, Filip. "Analiza zamora krajnje polne ploče sinkronog hidrogeneratora." Professional thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2014. https://urn.nsk.hr/urn:nbn:hr:235:261534

Bonačić, F. (2014). 'Analiza zamora krajnje polne ploče sinkronog hidrogeneratora', Professional thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:261534

Bonačić F. Analiza zamora krajnje polne ploče sinkronog hidrogeneratora [Professional thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2014 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:235:261534

F. Bonačić, "Analiza zamora krajnje polne ploče sinkronog hidrogeneratora", Professional thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2014. Available at: https://urn.nsk.hr/urn:nbn:hr:235:261534

Metadata
TitleAnaliza zamora krajnje polne ploče sinkronog hidrogeneratora
AuthorFilip Bonačić
MentorZdenko Tonković (mentor)
Committee memberDragan Pustaić (predsjednik povjerenstva)
Committee memberZdenko Tonković (član povjerenstva)
Committee memberMladen Franz (član povjerenstva)
Committee memberJanoš Kodvanj (član povjerenstva)
Committee memberMladen Meštrović (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2014-07-02, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U radu je prikazana kvazistatička analiza čvrstoće krajnje polne ploče za slučaj pobjega generatora. Kao sastavni dio rotora krajnja polna ploča opterećena je vlastitom centrifugalnom silom te centrifugalnom silom namota. Ove sile poprimaju najveći iznos u slučaju pobjega generatora, što je maksimalna brzina vrtnje koja se javlja u radu, a nastaje tijekom naglog rasterećenja stroja. Koncentracije naprezanja krajnje polne ploče na mjestima geometrijskih diskontinuiteta su detaljnije analizirane metodom podmodeliranja u programskom paktu Abaqus koji se temelji na metodi konačnih elemenata. Rezultati numeričkog i analitičkog proračuna učvršćenja krajnje polne ploče su međusobno uspoređeni. Na temelju rezultata kvazistatičkih proračuna provedena je analiza zamora pomoću − metode u programskom paketu FE-Safe. Na mjestima najvećih vlačnih naprezanja pretpostavljene su hipotetske pukotine različitih dimenzija te je metodama mehanike loma procijenjena preostala čvrstoća krajnje polne ploče. U tvornici Končar Generatori i motori d.d. primjenjuje se dobavni uvijet koji ne tolerira postojanje makropukotina u materijalu. U radu je provjerena opravdanost ovog uvjeta. Za navedene proračune upotrebljeni su eksperimentalno određeni parametri čelika za poboljšavanje 34CrMo4 od kojeg se izrađuju krajnje polne ploče. Svi eksperimenti su provedeni u Laboratoriju za eksperimentalnu mehaniku Fakulteta strojarstva i brodogradnje Sveučilišta u Zagrebu.
Abstract (english)
This paper presents a quasistatic stress analysis of a hydrogenerator rotor end pole plate for the runaway load case. As a part of rotor assembly, end pole plate is loaded with own centrifugal force and centrifugal force from the winding. These forces reach their maximum at runaway speed, which is maximum rotating speed of a generator that can occur during service. Stress concentrations at geometric discontinuities are analyzed in detail using sub-modeling technique in Abaqus software suite based on finite element method. Numerical and analytical stress analysis for generator pole fixation are mutually compared. Fatigue life calculation based on − method have been carried out using results from quasistaic stress analysis. To determine crack propagation resistance of end pole plate, crack with variable length is assumed at geometric discontinuity locations with maximum principal stresses. Acceptance criteria for end pole plate material used at Končar Generators and motors doesn't tolerate initial cracks in material. This criteria is verified. Stated calculations use experimentally determined material properties. Used material is steel for quenching and tempering 34CrMo4 in Q+T state, which is often used for end pole plate manufacturing. All experiments are done in Laboratory of experimental mechanics at Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:261534
Study programmeTitle: Mechanical Engineering and Naval Architecture - specialist
Study programme type: university
Study level: postgraduate specialist
Academic / professional title: sveučilišni/a specijalist/specijalistica strojarstva i brodogradnje (sveučilišni/a specijalist/specijalistica strojarstva i brodogradnje)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2021-05-27 08:44:56