TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Loads of Tracks Dippers which Lead to Cracks in the Structure During Quarrying
(Solicitări ale benelor de camion care conduc la apariţia fisurilor în structură, la exploatarea în carieră)
Vol LXV • No. 4/2013
Laurenţiu Sârbu
Faculty of Technological Equipment, Technical University of Civil Engineering of Bucharest
e-mail: laurentiusarbu_utcb@yahoo.com

 Keywords   dipper metal structure, dipper request of dumpe, fissures propagation, tension distribution in plates with holes

 Abstract
The structure of a transportation great capacity dipper, used to supply crushed mineral aggregates was modelled. The demanding plastically and elastically deformation of structure was set under the conditions of the impact of a boulder delivered in the dipper, by passing the structure through resonance transmission and brake car. Graphs were drawn corresponding to rotating components of mechanical models calculations suggested for metallic structure deformation, subjected to shock and free and forced oscillations in longitudinal and transverse plan. Conditions of energetic equilibrium for the propagation of fissures in the structure and stress distribution around a hole were indicated.

 Rezumat
S-a modelat structura unei bene de transport de mare capacitate, montată pe camion, care lucrează în exploatări miniere, pentru alimentarea instalaţiilor de concasat agregate minerale. S-a determinat solicitarea structurii la deformare elasto - plastică, în condiţii de exploatare la impactul unui bolovan descărcat în benă, sau la trecerea structurii prin rezonanţă la frânarea transmisiei maşinii. Au fost trasate graficele corespunzătoare rotirii componentelor modelelor de calcul, ale structurii propuse pentru analiza deformărilor structurii mecanice supuse la şocuri la încărcare, şi la oscilaţii libere şi forţate în transport, în plan longitudinal şi transversal.



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