Application Of The K- Turbulence Model
To Assess The Flutter Derivatives Of A
Long Span Bridge
Author(s)
F. Brusiani, G. Cazzoli, S. de Miranda, F. Ubertini & P. Vaona
Abstract
This paper considers the influence of the turbulence model adopted to
numerically predict the aero-elastic phenomena in Fluid Structure Interaction
(FSI) problems. After a detailed evaluation of the main suitable turbulence
models available in the Reynolds Average Navier Stokes (RANS) approach, the
two-equation k-turbulent model was identified as the best compromise
between solution accuracy and computational cost. In order to test the k-
turbulence model performance for FSI applications, a specific simulation
methodology was defined. It was firstly tested in assessing the aerodynamic
forces resulting on static bluff bodies for which experimental databases were
available. Then, the simulation methodology based on the k- turbulence model
was used to reproduce the steady and unsteady aerodynamic forces induced on a
Great Belt East bridge cross section subjected to wind load. In particular, the
unsteady aerodynamic forces induced on the bridge were evaluated by
calculating the flutter derivatives. As for the test cases, also for the Great Belt
East bridge the computational results were compared to experimental evidence
obtained by wind tunnel tests.
Keywords: numerical simulation, turbulence, long span bridge, flutter
derivatives.
1 Introduction
On built environments subjected to fluid flow action, vibrations can be forced by
vortex resonance or structure self-excitation. When fluid-structure interaction
Keywords
numerical simulation, turbulence, long span bridge, flutter
derivatives
Related Book
Other papers in this volume
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