Across-wind vibrations of structures of circular cross-section. Part I. Development of a mathematical model for two-dimensional conditions

Vickery, B.J.; Basu, Roger

doi:10.1016/0167-6105(83)90080-6

Cited by 205 publications

(56 citation statements)

References 13 publications

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“…Near this frequency greater body movement is elicited, and the structural motion begins to interact strongly with the flow in such a way that the vortex shedding frequency synchronizes with the structure's natural frequency which controls the vortex-shedding phenomenon even when variations in flow velocity modify the nominal Strouhal frequency away from the natural frequency by a few percent. This phenomenon is called lock-in and it is observed for low values of mass and/or structural damping [13].…”

Section: Lock-in and Drag Amplification Phenomenonmentioning

confidence: 99%

Simplified numerical method for understanding the aeroelastic response of line slender structures under vortex shedding action

Vasallo¹,

Lorenzana²,

Foces³

et al. 2009

WIT Transactions on the Built Environment

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The lock-in and drag amplification phenomenon is studied in a flexible cantilever using a simplified fluid-structure interaction (FSI) algorithm. NavierStokes equations for incompressible flow have been solved in 2D in several transverse planes of the line-like structure. A fractional step scheme has been used to solve the fluid field. In each fluid plane, the displacements have been taken into account considering an Arbitrary Lagrangian Eulerian (ALE) approach. The stabilization of convection and diffusion terms has been achieved by means of orthogonal quasi-static subscales. No turbulence model has been included. In order to solve the structural problem, a monodimensional element for thin walled cross-section beams has been considered. The standard second order Newmark method has been used to include the dynamical behaviour equations. The wind has been considered to be an incompressible fluid acting on the structure in a series of planes that are independent among them, and transverse to the structure. For each period of time, the fluid problem was solved, the aeroelastic analysis was carried out, and the geometry of the mesh of each fluid plane was updated according to the structure displacements.

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Section: Lock-in and Drag Amplification Phenomenonmentioning

confidence: 99%

Simplified numerical method for understanding the aeroelastic response of line slender structures under vortex shedding action

Vasallo¹,

Lorenzana²,

Foces³

et al. 2009

WIT Transactions on the Built Environment

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“…Although there appears to be no actual anemometer record from within a tornado, much has been learnt from radar and Lemon & Doswell [35], DaviesJones [36] and Klemp [37] describe tornadic thunderstorm evolution. Rotation in the updraft is a precursor to tornadogenesis and the interaction of environmental wind shear and upwelling air is thought responsible for initiating updraft rotation.…”

Section: Thunderstorm Charcteristicsmentioning

confidence: 99%

Invited Lectures

Sørensen¹,

Hansen²,

Rosas

et al. 2001

Wind Engineers, JAWE

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“…Methods for predicting the response of chimneys given by Vickery and Basu (1983a), ESDU (1978) and equivalent static methods reported by Vickery and Basu (1983b) and van Koten (1986) are examined here. A summary of these procedures along with the Information concerning their parameters is detailed in Simiu and Scanlar (1986).…”

Section: Semi-analytical and Empirical Proceduresmentioning

confidence: 99%

“…Once the amplitude of the motion becomes large, the models based on the flow field around a stationary cylinder no longer represent the acrosswind force. An additional force component which is associated with the motion of a structure must be included Kareem, 1981 (Vickery andBasu, 1983a).…”

Section: Semi-analytical and Empirical Proceduresmentioning

confidence: 99%

Acrosswind response of reinforced concrete chimneys

Cheng

Kareem²

1992

Journal of Wind Engineering and Industrial Aerodynamics

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The acrosswind response of isolated reinfe~c~d concrete chimneys of circular cross-section is studied using wind tunnel tests, full-scale measureme,~ts and response predictions based on semi-empirical methods. Three chimneys with available full-scale response observations were selected for this study to compare their measured and predicted responses. The wind tunnel experiments involved measurements of unsteady aerodynamic loads on rigid models of circular cross-section and aeroelastic response of scale models of full-scale chimenys. Tests were conducted initially on smooth surface models, which were repeated with artificially roughened surface. Attachment of discrete two dimensional surface roughness helps to simulate artificially flow field features past a cylinder that represent the characteristics of high Reynolds number flows. Utilizing this roughness configuration permits response prediction of chimneys in boundary layer wind tunnels with a good agreement with the observed full-scale response.

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Across-wind vibrations of structures of circular cross-section. Part I. Development of a mathematical model for two-dimensional conditions

Cited by 205 publications

References 13 publications

Simplified numerical method for understanding the aeroelastic response of line slender structures under vortex shedding action

Simplified numerical method for understanding the aeroelastic response of line slender structures under vortex shedding action

Invited Lectures

Acrosswind response of reinforced concrete chimneys

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