<p>Disertacija obrađuje problematiku praktičnog uvođenja opterećenja izazvanih<br />zakošavanjem dizalice u normiranu proceduru dokaza zamorne čvrstoće njene noseće<br />konstrukcije. U prvom delu rada koncizno je izložena teorijska podloga zakošavanja<br />mosne dizalice, neophodna za potpunije razumevanje relevantnih obeležja predmeta<br />istraživanja. Predložene su metode za eksperimentalnu determinaciju bočnih sila u<br />interakciji točak – šina, odn. vodeća rolna – šina. Testiranje predloženih metoda<br />spovedeno je kroz eksperimente na realnom objektu – jednogredoj električnoj mosnoj<br />dizalici nosivosti 3,2 t i raspona 8,91 m. Komentarisani su reprezentativni rezultati i<br />date su smernice za sprovođenje dokaza zamorne čvrstoće detalja noseće konstrukcije<br />dizalice, uzimajući u obzir pri tom i spektre sila zakošenja. Takođe je ukazano i na<br />neke nejasnoće i nedorečenosti u važećim standardima, a u vezi proračunskog<br />određivanja sila zakošenja.</p> / <p>The dissertation deals with the problem of practical application of loadings caused by<br />crane skewing, in normative procedures of fatigue strength proof calculations of crane<br />supporting structure. In the first part, the theoretical framework of bridge crane<br />skewing, necessary for better understanding of relevant characteristics of the research<br />topic, has been concisely elaborated. Methods are proposed for experimental<br />determination of lateral forces in wheel/rail and guiding roller/rail contacts. These<br />methods were tested through a series of experiments on a real object – an electrically<br />driven single girder bridge crane with a capacity of 3.2 t, and span 8.91 m. Some<br />representative measurement results are discussed and guidelines are given for<br />performing the fatigue strength proof calculation of crane supporting structure details,<br />taking into account skewing forces spectra, too. Also, attention has been drawn to<br />certain unclear points and inconsistencies in norms in force, concerning calculative<br />determination of skewing forces.</p>
| Identifer | oai:union.ndltd.org:uns.ac.rs/oai:CRISUNS:(BISIS)107221 |
| Date | 02 July 2018 |
| Creators | Zelić Atila |
| Contributors | Zuber Ninoslav, Vladić Jovan, Gašić Vlada, Šostakov Rastislav, Georgijević Milosav |
| Publisher | Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, University of Novi Sad, Faculty of Technical Sciences at Novi Sad |
| Source Sets | University of Novi Sad |
| Language | Serbian |
| Detected Language | English |
| Type | PhD thesis |
Page generated in 0.0027 seconds