Numerische Simulation der Spannungs- und Geschwindigkeitsfelder in Silos mit Einbauten

Inserts in silos are used to change the flow pattern which again influences the stress distribution in the bulk material and silo wall loads. Since the failure rate of silo structures is rather high, it has been recognized as being very important to analyse the flow and stress behaviour of the bulk material and the wall normal stress distribution of such silos. For an experimental study, measurements have been carried out by Strusch at a model silo of the Institute of Mechanical Process Engineering (Technische Universitaet Braunschweig). The influence of the inserts' geometry and position on the wall normal stress distribution and the insert load is analysed. The numerical studies are based on a Finite Element approach, which was developed by J.Eibl's research group (Universitaet (TU) Karlsruhe). The original computer code is extended for taking into account rigid and elastic inserts. To compare the results of the FE-calculation with those of the experiments, the specific geometry of the model silo as well as the bulk material characteristics are included in the numerical simulation. Finally parametric studies show the influence of different insert sizes and positions on the wall normal stress and on the insert loads. (orig.)SIGLEAvailable from TIB Hannover: RR 5346(25) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman