Assessment Of Flutter Speed On
Long Span Bridges
Author(s)
M. Papinutti, J. Kramer Stajnko, R. Jecl, A. Štrukelj,
M. Zadravec & J. Á. Jurado
Abstract
In this paper it is shown how to calculate flutter speed on the example of the
Great Belt East Bridge in Denmark. Two numerical approaches are shown for
prediction of the aeroelastic phenomena on bridges. In the computational fluid
dynamics (CFD) simulation turbulence model based on Reynolds Average
Navies Stokes (RANS) approach, two-equation shear stress turbulence (SST)
models were chosen. Although the SST model needs more computer resources
compared to the k-ω and k-ε models, it is still affordable with multi-processing
personal computers. In this paper extracted flutter derivatives in the force
vibration procedure are shown. Flutter derivatives are later used in the hybrid
method of flutter. Final flutter speed was calculated based on flutter derivatives
from fluid structure interaction extraction and experimental extraction. Flutter
velocity was also determined with a free vibration of deck at the middle of the
bridge. The deck section of unit length was clamped into springs and dampers.
Flutter speed was reached with time increasing of wind speed until large
oscillations occurred. The general procedure of how to formulate the fluid
structure interaction and necessary stapes for flutter analysis of the bridge is
shown in this paper. Numerically extracted flutter derivatives are compared
based on the final flutter speed to experimental measurements of the deck
section.
Keywords: bridge aeroelasticity, long span bridge, flutter derivatives, numerical
simulation, fluid structure interaction, computational fluid dynamics.
Keywords
bridge aeroelasticity, long span bridge, flutter derivatives, numerical
simulation, fluid structure interaction, computational fluid dynamics.
Related Book
Other papers in this volume
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