COMPUTER AND NATURAL EXPERIMENT IN DETERMINATION OF STRESSES AND DEFORMATIONS OF METAL STRUCTURES
Abstract
In this work, an approach to estimating the residual life of load-lifting machines that have been in operation for a long time, using mathematical modeling using the finite element method to determine stress fields and identify the most dangerous zones, was considered. The analysis shows that the average age of cranes is outside the allowed limits. The issue of updating the fleet of lifting machines and technical re-equipment of industrial enterprises requires time and large capital expenditures. The purchase of new crane equipment raises the question of its cost, design and manufacture time, methods of its transportation to the destination, installation, its settings and other current problems, implies a long waiting time and significant capital costs.
Recently, methods and technologies have been introduced into engineering practice, which allow today, at relatively low cost, to significantly increase the operational resource of the existing load-lifting machinery fleet.
The development of modern technology can significantly reduce the wear and destruction of elements of metal structures of crane equipment and their mechanisms, by establishing frequency control, was not available in this form in previous years.
To obtain real loads arising in the metal structures of the loaders, a full-scale experiment was carried out by using strain gauges at the maximum possible load and then comparing the obtained data with the calculated ones. The research methods are mathematical, a full-scale experiment and statistical.
The conclusions about the current state of the metal structures of the individual lifting machine and about the conditions for the possibility of further operation of the metal structures of these control panels were drawn based on the obtained results. (Based on the results obtained, conclusions were drawn about the current state of the metal structures of the individual lifting machine and about the conditions for the possibility of further operation of the metal structures of these control panels.) The approach to solving this problem can be applied to most types of lifting machines in operation.
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