Prediction of aerodynamic characteristics of a box girder bridge section using the LES turbulence model

Sarwar, M.W.; Ishihara, Takeshi; Shimada, Kenji; Yamasaki, Yasutsugu; Ikeda, Torahiko

doi:10.1016/j.jweia.2008.02.015

Cited by 63 publications

(25 citation statements)

References 8 publications

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“…Similar analyses for slightly different bridge deck geometries can be found, for instance, in [58][59][60][61]. The simulations were performed for the configuration with both sharp (R/B = 0) and rounded edges (R/B = 0.05), and the only experimental results available were those for the CRIACIV section [55,62], which, as previously mentioned, presents lower edges with a certain degree of roundness.…”

Section: Flutter Derivativesmentioning

confidence: 83%

Applicability of URANS and DES Simulations of Flow Past Rectangular Cylinders and Bridge Sections

Mannini

2015

Computation

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This paper discusses the results of computational fluid dynamics simulations carried out for rectangular cylinders with various side ratios of interest for many civil engineering structures. A bridge deck of common cross-section geometry was also considered. Unsteady Reynolds-averaged Navier-Stokes (URANS) equations were solved in conjunction with either an eddy viscosity or a linearized explicit algebraic Reynolds stress model. The analysis showed that for the case studies considered, the 2D URANS approach was able to give reasonable results if coupled with an advanced turbulence model and a suitable computational mesh. The simulations even reproduced, at least qualitatively, complex phenomena observed in the wind tunnel, such as Reynolds number effects for a sharp-edged geometry. The study focused both on stationary and harmonically oscillating bodies. For the latter, self-excited forces and flutter derivatives were calculated and compared to experimental data. In the particular case of a benchmark rectangular 5:1 cylinder, 3D detached eddy simulations were also carried out, highlighting the improvement in the accuracy of the results with respect to both 2D and 3D URANS calculations. All of the computations were performed with the Tau code, a non-commercial unstructured solver developed by the German Aerospace Center.

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Section: Flutter Derivativesmentioning

confidence: 83%

Applicability of URANS and DES Simulations of Flow Past Rectangular Cylinders and Bridge Sections

Mannini

2015

Computation

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“…Another approach is to use computational fluid dynamics to simulate the flow around a bridge section (e.g. Huang et al, 2009;Sarwar et al, 2008;Zhu et al, 2007); however, it still remains challenging to obtain reliable results, thus making wind tunnel testing necessary. Wind tunnel tests are commonly conducted using full bridge models, taut strip models or section models.…”

Section: Introductionmentioning

confidence: 99%

An enhanced forced vibration rig for wind tunnel testing of bridge deck section models in arbitrary motion

Siedziako

Øiseth

Rönnquist

2017

Journal of Wind Engineering and Industrial Aerodynamics

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This paper presents a new experimental setup for the aerodynamic section model testing of bridge decks. The rig is designed to move a section model in arbitrary motion in a wind tunnel to imitate the motions of such scaled real bridge motion, step motion or random motion histories to be close to white noise. The proposed setup enables the forces acting on the section model to be measured directly while considering motions that resemble actual bridge motion and still fully utilizing the benefits of the forced vibration testing technique. The excellent performance of the system and testing procedure is proved by performing state-of-the-art forced vibration tests to extract 18 flutter derivatives of the Hardanger Bridge cross-section. The new experimental setup is further used to simulate a three-degree-of-freedom dynamic system driven by white noise to investigate whether the estimates of the aerodynamic derivatives are sensitive to the motion considered. The experimental results demonstrate that the estimates of the aerodynamic derivatives are not sensitive to the motion considered; these results indicate that the principle of superposition is fully applicable for the cross section as long as the motions are within the range considered.

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“…Braun and Awruch (2003), computed the response of a B/H = 5 rectangular cylinder displaying wind-induced free oscillation in heave and pitch degrees of freedom. A more recent application can be found in Sarwar, Ishihara, Shimada, Yamasaki, and Ikeda (2008), where the flutter derivatives of rectangular cylinders with aspect ratios 10:1 and 20:1 were computed as part of a numerical study for obtaining the flutter derivatives of a box girder deck. In Sun, Owen, Wright, and Liaw (2008), the numerical results for the A * 2 flutter derivative of the B/H = 4 rectangular cylinder using a 3D LES approach are reported.…”

Section: Introductionmentioning

confidence: 99%

On the applicability of 2D URANS and SSTk-ωturbulence model to the fluid-structure interaction of rectangular cylinders

Nieto

Hargreaves

Owen

et al. 2015

Engineering Applications of Computational Fluid Mechanics

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In this work the practical applicability of a 2D URANS approach adopting a block structured mesh and Menter's SST k-ω turbulence model in fluid-structure interaction (FSI) problems is studied using as a test case a ratio B/H = 4 rectangular cylinder. The vortex-induced vibration (VIV) and torsional flutter phenomena are analyzed based on the computation of the out-of-phase and in-phase components of the forced frequency component of lift and moment coefficients when the section is forced to periodically oscillate both in heave and pitch degrees of freedom. Also the flutter derivatives are evaluated numerically from the same forced oscillation simulations. A good general agreement has been found with both experimental and numerical data reported in the literature. This highlights the benefits of this relatively simple and straightforward approach. These methods, once their feasibility has been checked, are ready to use in parametric design of bridge deck sections and, at a later stage, in the shape optimization of deck girders considering aeroelastic constraints.

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Prediction of aerodynamic characteristics of a box girder bridge section using the LES turbulence model

Cited by 63 publications

References 8 publications

Applicability of URANS and DES Simulations of Flow Past Rectangular Cylinders and Bridge Sections

Applicability of URANS and DES Simulations of Flow Past Rectangular Cylinders and Bridge Sections

An enhanced forced vibration rig for wind tunnel testing of bridge deck section models in arbitrary motion

On the applicability of 2D URANS and SSTk-ωturbulence model to the fluid-structure interaction of rectangular cylinders

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