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- Autors
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Loveikin V. S., Romasevych Yu. A., Pilipenko A. P., Mushtyn D. I.
- Issue
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Hoisting and transport equipment, 2021, №2(66)
- Pages
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4-19
- DOI
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10.15276/pidtt.2.66.2021.01
- Abstract
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The analysis of experimental data at simultaneous movement of slewing and trolley movement mechanisms of tower crane is carried out in the article. The main kinematic, dynamic and electrical characteristics and indicators, which showed a significant intensity of the mechanisms in transient modes of motion, are established. The causes of oscillations of the load on the flexible suspension in the normal and tangential directions are investigated and the factors influencing their evolution are established. The current loads of the electric drives of the mechanisms are investigated taking into account the fact that the electric motor of the trolley movement mechanism is supplied by the frequency invertor.
An analysis of the reasons for the deviation between the experimental data and the data corresponding to the previously developed mathematical models of the simultaneous movement of slewing and trolley movement mechanisms of tower crane is carried out. The analysis is performed on base of the maximum and root-mean-square indicators, as well as using graphical dependencies. Among the main reasons for the deviation of the data is the influence of high-frequency oscillations of the metal structure of the installation. However, the theoretical results fairly accurately describe the low-frequency pendulum oscillations of the load on the flexible suspension and their dynamic effect on the system. This applies, in particular, to the damped nature of oscillations and their period.
- Keywords
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indicators, experimental data, tower crane, model, analysis.
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