Published since 1923
DOI: 10.33622/0869-7019
Russian Science Citation Index (RSCI) на платформе Web of Science


  • BUILDING STRUCTURES, BUILDINGS AND FACILITIES
  • Dynamic Vibration Damping for Rigid Busbar Structures (In English)
  • UDC 624.042.41
    doi: 10.33622/0869-7019.2023.10.89-95
    Serafim A. FOMENKO1, Ph. D, Associate Professor of Theoretical and Applied Mechanics department, fomenko_sa@mail.ru
    Igor M. GARANZHA2, Ph. D, Associate Professor, Associate Professor of Metal and Timber Structures department, garigo@mail.ru
    Anton V. TANASOGLO2, Ph. D, Associate Professor, Associate Professor of Metal and Timber Structures department, a.v.tan@mail.ru
    1 Donbas National Academy of Civil Engineering and Architecture (DNACEA), ul. Derzhavina, 2, DPR, Makeyevka 86123, Russian Federation
    2 Moscow State University of Civil Engineering (National Research University), Yaroslavskoe shosse, 26, Moscow 129337, Russian Federation
    Abstract: Introduction. In the case when flexible structures interact with the wind flow, various phenomena of aerodynamic instability may arise. Typical representatives of such phenomena are vortex wind excitation of cylindrical structures, galloping of poorly streamlined structures with a square, rectangular or rhomboid cross-section, etc. The experience of rigid busbar operating shows that transverse resonant oscillations may be excited at relatively low (several meters per second) wind speeds. In some cases, they continue for several hours. It also should be noted that the longitudinal vibrations of the busbar are several times less or almost absent. Such operating conditions showed the need to install additional devices (dampers) to reduce the vibration amplitudes of structures in the resonant mode. The issue of reducing the level of vibrations on the structure is very often associated with the need to increase stiffness and reduce material consumption of structure. However, it is important to comply with the technological requirements of the operating conditions as well as protect people from the harmful effects of vibration. The article highlights some basic ways of damping vibrations of rigid busbar structures. Materials and methods. The method of dynamic vibration damping consists in attaching additional devices to the vibration protection object to change its vibration state. The work of dynamic dampers is based on the formation of force effects transmitted to the object. It differs from another method of vibration reduction, characterized by the imposition of additional kinematic connections on the object such as fixing its particular points. Results. A mathematical model of the plate dynamic damper operation with a point load is presented. To determine the optimal parameters of dynamic vibration dampers, their calculation was performed, taking into account the joint action of the rigid busbar and the damper. Experimental research of the conjoint work of a rigid busbar with a plate dynamic damper is carried out. Conclusions. The effective application of plate dynamic dampers with a point load has been confirmed both outside and inside the tube busbar. Is proposed the special plate vibration damper. This allows to increase the logarithmic decrement of oscillations by 3-3,5 times and reduce the amplitude of oscillations of rigid busbar structures in the resonant mode by 12 time.
    Keywords: dynamic vibration damping, rigid busbar, outdoor switchgear, vortex wind excitation, plate dynamic damper, point load
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  • For citation: Fomenko S. A., Garanzha I. M., Tanasoglo A. V. Dynamic vibration damping for rigid busbar structures. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering], 2023, no. 10, рp. 89-95. (In Eng.). doi: 10.33622/0869-7019.2023.10.89-95

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