The influence of the structural vibrations' logarithmic decrement on its stability in the event of vortex excitation

The article considers the influence of the structural vibrations' logarithmic decrement on its stability in the event of vortex excitation. The relevance of the topic is due to the widespread problem of vortex excitation in the construction and operation of large-span bridge structures. The int...

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Published inIOP conference series. Materials Science and Engineering Vol. 913; no. 4; pp. 42069 - 42074
Main Authors Poddaeva, O I, Fedosova, A N, Churin, P S
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.08.2020
Subjects
Aerodynamic stability
Aerodynamics
Bridges
Excitation
Structural stability
Vortices
Wind tunnels
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Summary:The article considers the influence of the structural vibrations' logarithmic decrement on its stability in the event of vortex excitation. The relevance of the topic is due to the widespread problem of vortex excitation in the construction and operation of large-span bridge structures. The introduction presents the characteristic features of vortex excitation as a phenomenon of aerodynamic instability. In the second section, the research method is given, the research object is described, and the considered variants of the logarithmic decrement of the beam span's investigated construction vibrations are given. The third section presents the experimental studies' results at the Unique Scientific Installation, Big Research Gradient Wind Tunnel, NRU MGSU in graphical form. The conclusions about increasing the structural stability with increasing values of the vibrations' logarithmic decrement are drawn.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/913/4/042069