Abstract
Abstract This article focuses on the experimental verification of a mathematical derivation of Janssen’s theory, which describes the distribution of pressures within the bulk material and pressure distribution on the walls of storage facilities. The experimental verification is performed in two ways. The first is the real measurement of the load transfer in a bulk material cylinder and the second is similar to the detection of the load transfer through simulations using the DEM method. The aim is to compare the results of the theoretical calculation according to Janssen’s theory with the real measurement and a simulation of exactly the same model situation. At the beginning of any design or optimisation of existing transport or storage facilities, the most important is the analysis of the bulk material in the form of measurements of mechanical-physical properties. The analysis methods used are also described here. The pressure at the bottom of a storage container between the methods used showed negligible differences. From this finding, it can be concluded that the DEM method is a very suitable means for verifying the design of transport and storage facilities. The simulations provide important information and insights that can also be used to optimise existing transport or storage facilities.
Highlights
In the past, designers had to rely solely on empirical calculations and their own experience in designing storage facilities
This article focuses on the experimental verification of a mathematical derivation of Janssen’s theory, which describes the distribution of pressures within the bulk material and pressure distribution on the walls of storage facilities
The first is the real measurement of the load transfer in a bulk material cylinder and the second is similar to the detection of the load transfer through simulations using the DEM method
Summary
Designers had to rely solely on empirical calculations and their own experience in designing storage facilities. Pascal’s theory does not include any information about the structure of storage facilities and the stored material is only characterised by the density (bulk density for bulk materials) in the calculation of the pressure. It follows that the theory is applicable only for liquids and bulk materials with the angle of internal friction φe approaching 0∘. The standardised calculation according to Janssen’s theory [1,2,3,4,5,6,7] includes information about the structure of the storage facility and very important information about the stored material, which are mechanical and physical properties. Φw – angle of external friction between the stored material and the inner surface of the storage space [∘]
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