Open AccessThe influence of the structural vibrations’ logarithmic decrement on its stability in the event of vortex excitation
Author(s) -
Olga Poddaeva,
Anastasia Fedosova,
Pavel Churin
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/913/4/042069
Subject(s) - vibration , excitation , vortex , instability , logarithmic decrement , stability (learning theory) , logarithm , event (particle physics) , aerodynamics , section (typography) , span (engineering) , wind tunnel , bridge (graph theory) , physics , mechanics , structural engineering , classical mechanics , engineering , computer science , mathematics , acoustics , mathematical analysis , quantum mechanics , medicine , machine learning , operating system
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.