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- Autors
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Kyrychenko I. G., Reznikov O. O., Rosenfeld M. V., Momotov A. V., Shalamov M. A., Kokhan I. R.
- Issue
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Hoisting and transport equipment, 2021, №2(66)
- Pages
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20-29
- DOI
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10.15276/pidtt.2.66.2021.02
- Abstract
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Mobile elevating work platforms are boom-type machines with a working body attached to the base of the machine. The design of the elevator must ensure safe operation, assembly (disassembly) and maintenance. Accordingly, for these machines, the issue of stability is important both in the working position and in the transport position. In this work, a method has been developed to determine the stability of mobile elevating work platforms for an emergency stop in the transport position. In the developed two-dimensional model of the elevator, the following assumptions are made: the elevator is a rigid unchangeable structure, the connection is instantly imposed at a point located on the tipping axis. As a result of the simulation, the following dependences were obtained: the time dependences of the change in the maximum inclination angle of the MEWP and the dependence of the change in the angular speed relative to the tipping axis of the mobile elevator, which until a sudden stop moves uniformly along the horizontal surface at a predetermined speed. The analysis of the obtained dependences indicates that the angular speed relative to the tipping axis of the machine with the indicated parameters approaches 0 in 0.32s, while it should be noted that the maximum inclination angle of the machine increases from 60о to 72о in 0.2s from the moment the machine was stopped. The stability of the elevator under consideration is ensured since the angle of the maximum inclination of the MEWP did not exceed the value of π/2 (i.e., the machine did not reach such a position where the center of mass is above the tipping axis).
- Keywords
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mobile elevator, stability, transport position, modelling, speed.
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