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- Autors
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Ivanenko O. I., Krupko I. H., Yermakova S. O.
- Issue
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Hoisting and transport equipment, 2020, №3(64)
- Pages
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81-95
- DOI
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10.15276/pidtt.3.64.2020.08
- Abstract
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Analysis of the structures, methods of installation and conditions of tower cranes operation and methods of calculating their stability shows that recently there is a need to install the cranes that provide loading and unloading work in conditions of the limited sites. This raises the question in which the stability of cranes under different working conditions and different wind loads becomes an important indicator. In this case, the right choice of support circuit comes to the fore, for which it is very important to determine the loads on the supporting elements and to develop the design of the supporting elements themselves.
The aim of the study is to improve the safety of tower cranes operation on the basis of loads and the construction of the support circuit taking into account the working conditions, and the subject of the study is the process of loading and determining the distribution of loads between the supporting elements of the tower crane construction.
During the research, a method of calculating the load of the tower cranes supporting elements was developed taking into account the linear size of the machine and the spatial nature of the load, as well as theoretical studies were conducted based of the previously developed mathematical model for determining the loads on each of the crane supports at different positions of the arrow and cargo, the possible maximum loads arising during the operation of the crane on each of the supports were established.
The developed algorithm for calculating loads on the support of the crane, based on a mathematical model, allows to conduct a calculation experiment, to determine the size and nature of the change in loads on the support of the crane under different working conditions: at different loads, variable departures and wind loads.
To study the loads on the crane support elements according to the developed methodology under different modes of operation, a program was developed in the Maple software, where the KB-100 tower crane was taken as a model for research. All further theoretical studies were carried out on this model of the crane.
It has been established that the load on the main elements of the crane is vibrational. The loads that occur in the crane supports vary widely depending on the position of the crane elements. Some support points have both positive and negative loads when turning the crane. Fluctuations of loads on these points have an amplitude of about 200 kN.
- Keywords
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research, crane, influence, distribution, load, support, sustainability, algorithm, program, results
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