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Uticaj sila zakošenja na zamor noseće konstrukcije mosne dizalice pri njenom kretanju / On the influence of skewing forces upon the fatigue of a bridge cranestructure during travelling

<p>Disertacija obrađuje problematiku praktičnog uvođenja opterećenja izazvanih<br />zako&scaron;avanjem dizalice u normiranu proceduru dokaza zamorne čvrstoće njene noseće<br />konstrukcije. U prvom delu rada koncizno je izložena teorijska podloga zako&scaron;avanja<br />mosne dizalice, neophodna za potpunije razumevanje relevantnih obeležja predmeta<br />istraživanja. Predložene su metode za eksperimentalnu determinaciju bočnih sila u<br />interakciji točak &ndash; &scaron;ina, odn. vodeća rolna &ndash; &scaron;ina. Testiranje predloženih metoda<br />spovedeno je kroz eksperimente na realnom objektu &ndash; 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 zako&scaron;enja. Takođe je ukazano i na<br />neke nejasnoće i nedorečenosti u važećim standardima, a u vezi proračunskog<br />određivanja sila zako&scaron;enja.</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 &ndash; 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>

Identiferoai:union.ndltd.org:uns.ac.rs/oai:CRISUNS:(BISIS)107221
Date02 July 2018
CreatorsZelić Atila
ContributorsZuber Ninoslav, Vladić Jovan, Gašić Vlada, Šostakov Rastislav, Georgijević Milosav
PublisherUniverzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, University of Novi Sad, Faculty of Technical Sciences at Novi Sad
Source SetsUniversity of Novi Sad
LanguageSerbian
Detected LanguageEnglish
TypePhD thesis

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