Statistical prediction models of impact damage of airport conveyor belts

摘要

In the systems under the impact load such as airport conveyor belts used for the baggage transportation, the load is changed quickly in the short time intervals and the arising stresses are several times higher than related static stresses. The detailed stress analysis during the impact is theoretically a complex task and therefore the simplified solutions and related models have to be defined. They are based on the law of conservation and transfer of energy in assumption that during the impact the kinetic energy of the impacting object - baggage is very quickly changed into the potential energy of the stress of the elastic system - of the conveyor belt and particularly into the heat energy, which is often for the purpose of the approximate solution neglected. This process results after the certain operation time into the mechanical damage followed by the necessity to replace these segments, from which the conveyor belt consists. The article deals with the impact damage of these segments and describes methodology for the evaluation of the probability of their damage during the operation applying available statistical models, based on which it is possible to create a proposal for the optimization of the maintenance processes for the practical operation of the conveyor belt.