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vol. 4, nr. 3 (2004)
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Dynamic effects during the discharge process of large silos
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Maciej Niedostatkiewicz
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Faculty of Civil and Environmental Engineering, Gdańsk University of Technology ul. Narutowicza 11/12, 80-952 Gdańsk |
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vol. 4 (2004), nr. 3,
pp. 763-776
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abstract:
Dynamic effects in bulk solids are an inherent characteristic of each silo discharge. Most frequently, they occur in the form of pulsations and shocks. In dry granular materials (non-cohesive) only pulsations are created. In the case of cohesive bulk solids, pulsations and shocks can be observed at the same time. The intention of this paper is to present measurements of dynamic effects in large silos, caused by different reasons: resonance between bulk solids and silo system, resonance between technological devices and silo system. Measurements in large silos were performed with silos containing: polymer granulate, sugar and soy bean. In the case of a silo containing polymer granulate, dynamic effects were due to resonance between the bulk solid and the silo system. In a silo where sugar was stored, dynamic effects were induced by a mechanical exciter used to promote flow of sugar due to cohesion. In the case of a silo containing soy bean, dynamic effects were caused by a selector and feeder. During tests on large silos, vertical and horizontal accelerations on silo wall were measured. Moreover, the effect of the discharge velocity on acceleration amplitudes was investigated.
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keywords:
silo, dynamic effects, bulk solids
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original in:
Polish
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