Geometric identification of the support structure elements of the cranes with loading-unloading trolley

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Višegodišnjim istraživačkim radom kandidata u oblasti geometrijske identifikacije elemenata noseće strukture pretovarnih mosnih dizalica, potvrđenim saopštenjima i publikovanim radovima na domaćim i međunarodnim naučnim konferencijama i naučnim časopisima stvorena je naučno-stručna osnova za specijalizovana istraživanja koja su prezentovana u ovoj disertaciji. Teorijskom analizom uticajnih geometrijskih parametara nosača nosećih struktura, potvrđene eksperimentalnim istraživanjima na laboratorijskim modelima, formirani su teorijski odnosi geometrijskih veličina nosača. Sadržaj disertacije je tako koncipiran da između istraženih cjelina postoji funkcionalna povezanost. U toku samog istraživačkog poduhvata, posebna pažnja je posvećena analizi uticajnih parametara geometrijskih veličina nosača sandučastog tipa na odnos savojne i torzione krutosti. Rezultati sprovedenih eksperimentalnih istraživanja na laboratorijskom modelu pokazali su visoku podudarnost sa teorijskim. Time su potvrđene polazne osnove geometrijske identifikacije noseće strukture utovarno-istovarnih kolica i mosta pretovarnih dizalica. To se najbolje potvrđuje rezultatima mjerenja i rezultatima teorijskih istraživanja odnosa krutosti nosećih ramova utovarno-istovarnih kolica cki/ckj=(kj/ki) 3/2, kao i odnosa krutosti noseće konstrukcije pretovarnih dizalica čija je oslona baza (m⋅ n), ci/cj=(mj/mi)(nj/ni) 2 , što je od posebnog značaja za nastavak istraživanja usmjerenih na dinamičku analizu nosećih struktura pretovarnih mosnih dizalica.

After many years of the candidate’s research work in the field of geometric identification of the support structure elements of the cranes, confirmed by numerous papers published at the national and international scientific conferences and journals, a scientific and professional basis was created for the specialized research which has been presented in the doctoral thesis. Based on the theoretical analysis of the influential geometric parameters of the supports of the support structures, verified by experimental research on laboratory models, theoretical relations of the geometrical sizes of the supports have been formed. The content of the dissertation has such a concept that there is a functional connection between the investigated units. In the research work special attention was paid to the analysis of the parameters of geometrical sizes of the box type supports which have influence on the ratio of bending and torsional stiffness. The results of the experimental studies conducted on the laboratory model had a high compatibility with the theoretical results. Thus, the foundation of the geometric identification of the support structure of the loading-unloading trolley and the crane’s bridge was verified. This is best confirmed by the measurement results and the results of theoretical investigations of the stiffness ratio for support frames of the loading-unloading trolley cki/ckj=(kj/ki) 3/2, as well as the stiffness ratio for the support structure of the crane whose support base is (m⋅ n), ci/cj=(mj/mi)(nj/ni) 2 , which is significant for the continuation of research aimed at dynamic analysis of the support structures of the cranes.

crane, loading-unloading trolley, influential parameters, support structure, experimental verification, dynamic identification.

pretovarna dizalica, utovarno-istovarna kolica, uticajni parametri, noseća struktura, eksperimentalna verifikacija, dinamička identifikacija

621.875.1:621.873.2 (043.3)

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