Research of stress-strain state of elements of technological technical constructions

Ivan Nazarenko, Oleg Dedov, Maksym Delembovskyi, Yevhen Mishchuk, Mykola Nesterenko, Igor Zalisko and Volodymyr Slipetskyi
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Ivan Nazarenko: Kyiv National University of Construction and Architecture
Oleg Dedov: Kyiv National University of Construction and Architecture
Maksym Delembovskyi: Kyiv National University of Construction and Architecture
Yevhen Mishchuk: Kyiv National University of Construction and Architecture
Mykola Nesterenko: National University "Yuri Kondratyuk Poltava Polytechnic"
Igor Zalisko: Limited Liability Company "Drogobych Truck Crane Plant"
Volodymyr Slipetskyi: Corporation "DSK – ZHITLOBUD"

Chapter 8 in Dynamic processes in technological technical systems, 2021, pp 140-179 from PC TECHNOLOGY CENTER

Abstract: The distribution of stresses and strains in the elements of vibration structures of machines has been investigated. Vibrograms of changes in the stresses of the forming surface were obtained for individual elements located near the application of a dynamic external force. Comparing the obtained results of the stress-strain state of the forming structure, a new effect of using high frequencies of the operating mode when compacting concrete mixtures was discovered. Due to the application of a spatial forced force to the forming structure, a complex stress-strain state of metal structures is created. And direct contact with the concrete mix helps to reduce energy consumption for the compaction process. The study of the motion of systems related to block structures, the adopted model, which is a two-mass vibration system. The identified transient process is intended to be taken into account when determining the parameters and locations of the vibrators. In such modes, the forms of natural vibrations of the system are realized with large vibration amplitudes and, accordingly, a lower frequency. And this opened up a real opportunity to reduce the energy consumption of vibration machine drives. The stress-strain state of the frame and forms of a vibration unit with spatial vibrations has been investigated. The distribution of stresses in the frame elements is uneven. The concentration of stresses in the welding places of elements having small values in comparison with the ultimate strength of steel has been determined. The static and dynamic loads of the slewing ring of a truck crane have been investigated. The positions of the system and its elements with the highest stresses are established. The results obtained were used in the design of the metal structures of the machines under study.

Keywords: Metal structure; vibration system; stress-strain state; form-generating structure; model; numerical calculations; natural vibration modes; vibrator; spatial vibrations; truck crane; slewing ring (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:baq:pcchap:978-617-7319-49-7-ch8

DOI: 10.15587/978-617-7319-49-7.ch8

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