o:1190 Dinamičko ponašanje određenih klasa transportnih mašina sa aspekta incidentnih događaja The dynamical behaviour of certain classes of heavy lifting and construction machinery from the aspect of accidental events : doctoral dissertation sr The doctoral dissertation deals with incidents of heavy lifting and construction machinery. The research studies the stability and the risk of mechanical systems at the dynamic impulse influences which determine the safety of supporting structures. Typical incident events, at work of machinery, which influence in unique way on placed modelling and dynamical simulation, here are selected. The surveys on a group of five types of machines were carried out whereby the models of numerical simulations were developed, with the help of five experimental investigations of the structures for supporting model verification. The results of the disertation are: Exact identification of dangerous forced vibration frequencies; Mathematical formulation of incidental excitation forces; Mathematical forms of wind excitation forces with medium strength in multiple gusts; Geometry of frame structures with low dynamic stability; Mathematical forms of malicious excitations with large vibration amplitudes. Elements of risk are separated and defined: high accelerations, large deflections, shaking (tremor), extreme dynamic coefficients, loss of contact of structural parts. The finite element method (FEM) is applied in transient dynamic analysis of mechanical system. The experiments on tower crane, bridge crane, shipbuilding (levelluffing) crane, mining stacker and mobile elevating platform were performed. The obtained technical models are an incidental design template which checks sensitivity on extreme and unexpected influences. 533856406 91552101 4362 91552100 533856406 2016-12-21T10:51:15.053Z 45 no 46 mentor Goran N. Radoičić 2016 63 mentor Miomir 1951- Jovanović 2016 63 član komisije Jovan, 1949- Vladić 2016 63 član komisije Dragoslav. Janošević 2016 63 član komisije Nenad, 1950- Pavlović 2016 63 član komisije Goran, 1974- Petrović 2016 [21], 169 listova 15925664 http://phaidrabg.bg.ac.rs/o:1190 no yes 4 2016-12-21T10:51:15.320Z 70 Dinamički odgovor, eksperimentalno ispitivanje, incidenti,modalna analiza, modeliranje struktura, okvirne strukture,oscilacije, simulacija, stabilnost, transportne mašine Accidents, dynamical response, experimental testing, FEM modelling,frame structures, heavy lifting and construction machinery, modalanalysis, simulation, stability, vibration 621.86/.87:534(043.3) T 210 1738 18A04 18A0407 2016