On estimating the aerodynamic admittance of bridge sections by a mesh-free vortex method

Mads Mølholm Hejlesen; Johannes Tophøj Rasmussen; Allan Larsen; Jens Honore Walther

doi:10.1016/j.jweia.2015.08.003

On estimating the aerodynamic admittance of bridge sections by a mesh-free vortex method

Mads Mølholm Hejlesen, Johannes Tophøj Rasmussen, Allan Larsen, Jens Honore Walther

COWI A/S

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

A stochastic method of generating a synthetic turbulent flow field is
combined with a 2D mesh-free vortex method to simulate the effect of an
oncoming turbulent flow on a bridge deck cross-section within the
atmospheric boundary layer. The mesh-free vortex method is found to be
capable of preserving the a priori specified statistics as well as
anisotropic characteristics of the synthesised turbulent flow field.
From the simulation, the aerodynamic admittance is estimated and the
instantaneous effect of a time varying angle of attack is briefly
investigated. The obtained aerodynamic admittance of four
aerodynamically different bridge sections is compared to available wind
tunnel data, showing good agreement between the two.

Original language	English
Journal	Journal of Wind Engineering and Industrial Aerodynamics
Volume	146
Pages (from-to)	117-127
ISSN	0167-6105
DOIs	https://doi.org/10.1016/j.jweia.2015.08.003
Publication status	Published - 2015

Keywords

Bridge aerodynamics
Aerodynamic admittance
Buffeting response
Discrete vortex method
Stochastic turbulence generation

Access to Document

10.1016/j.jweia.2015.08.003

OpenUrl availability

Full text

Cite this

@article{48a18d55f582491ea6a066e112fc2708,

title = "On estimating the aerodynamic admittance of bridge sections by a mesh-free vortex method",

abstract = "A stochastic method of generating a synthetic turbulent flow field is combined with a 2D mesh-free vortex method to simulate the effect of an oncoming turbulent flow on a bridge deck cross-section within the atmospheric boundary layer. The mesh-free vortex method is found to be capable of preserving the a priori specified statistics as well as anisotropic characteristics of the synthesised turbulent flow field. From the simulation, the aerodynamic admittance is estimated and the instantaneous effect of a time varying angle of attack is briefly investigated. The obtained aerodynamic admittance of four aerodynamically different bridge sections is compared to available wind tunnel data, showing good agreement between the two.",

keywords = "Bridge aerodynamics, Aerodynamic admittance, Buffeting response, Discrete vortex method, Stochastic turbulence generation",

author = "Hejlesen, {Mads M{\o}lholm} and Rasmussen, {Johannes Toph{\o}j} and Allan Larsen and Walther, {Jens Honore}",

year = "2015",

doi = "10.1016/j.jweia.2015.08.003",

language = "English",

volume = "146",

pages = "117--127",

journal = "Journal of Wind Engineering and Industrial Aerodynamics",

issn = "0167-6105",

publisher = "Elsevier",

}

TY - JOUR

T1 - On estimating the aerodynamic admittance of bridge sections by a mesh-free vortex method

AU - Hejlesen, Mads Mølholm

AU - Rasmussen, Johannes Tophøj

AU - Larsen, Allan

AU - Walther, Jens Honore

PY - 2015

Y1 - 2015

N2 - A stochastic method of generating a synthetic turbulent flow field is combined with a 2D mesh-free vortex method to simulate the effect of an oncoming turbulent flow on a bridge deck cross-section within the atmospheric boundary layer. The mesh-free vortex method is found to be capable of preserving the a priori specified statistics as well as anisotropic characteristics of the synthesised turbulent flow field. From the simulation, the aerodynamic admittance is estimated and the instantaneous effect of a time varying angle of attack is briefly investigated. The obtained aerodynamic admittance of four aerodynamically different bridge sections is compared to available wind tunnel data, showing good agreement between the two.

AB - A stochastic method of generating a synthetic turbulent flow field is combined with a 2D mesh-free vortex method to simulate the effect of an oncoming turbulent flow on a bridge deck cross-section within the atmospheric boundary layer. The mesh-free vortex method is found to be capable of preserving the a priori specified statistics as well as anisotropic characteristics of the synthesised turbulent flow field. From the simulation, the aerodynamic admittance is estimated and the instantaneous effect of a time varying angle of attack is briefly investigated. The obtained aerodynamic admittance of four aerodynamically different bridge sections is compared to available wind tunnel data, showing good agreement between the two.

KW - Bridge aerodynamics

KW - Aerodynamic admittance

KW - Buffeting response

KW - Discrete vortex method

KW - Stochastic turbulence generation

U2 - 10.1016/j.jweia.2015.08.003

DO - 10.1016/j.jweia.2015.08.003

M3 - Journal article

SN - 0167-6105

VL - 146

SP - 117

EP - 127

JO - Journal of Wind Engineering and Industrial Aerodynamics

JF - Journal of Wind Engineering and Industrial Aerodynamics

ER -

On estimating the aerodynamic admittance of bridge sections by a mesh-free vortex method

Abstract

Keywords

Access to Document

OpenUrl availability

Fingerprint

Cite this