Vybrané aplikace z modelování vlastností a procesů partikulárních hmot pomocí DEM: v aplikaci na redlerový dopravník

Abstract

This doctoral thesis deals with optimization issues, innovative method of Redler conveyors designing and processes principle of the obstacle passing through material. The problem of the Redler conveyor design with a focus on the design of the carrier geometry is solved here. The introduction of this work is focused on history, description of transport method, basic computations and problems of bulk material transport in these conveyors. Consequently are described following methods: Discrete Element Method (DEM), Deformation Analysis of Finite Elements (FEM) and Particle Image Velocimetry Method using high-speed camera (PIV). These methods were used to validate the simulation model of bulk material and to achieve the result of this thesis. The DEM method uses the knowledge of mechanical-physical properties of bulk material. All required properties of the conveyed material were measured in the laboratory and the suitable representative for simulations was determined. This material was validated before solving the issue of this thesis using the above mentioned methods and results were compared with real experiments. After verification of the results correctness of chosen conveyed bulk material representative, simulations of this material transport in the Redler conveyor were created. Simulation environment with given parameters and sets of carriers with different geometries were created in DEM and inserted into the created environment. After simulation computations were evaluated all parameters and created characteristics determining the carrier and its geometric layout. In conclusion of this thesis are summarized results and presented scientific contributions for this area.