Basic study on spatial correlations of fluctuating lifts acting on plates

Nagao, Fumiaki; Utsunomiya, H.; Noda, Minoru; Oshima, Y.

doi:10.1016/j.jweia.2003.09.034

Cited by 9 publications

(8 citation statements)

References 5 publications

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“…Furthermore, spatial coherence is related not only to the flow frequency and section intervals but also the integral scale, turbulence intensity, section features like the ratio of deck width to deck thickness, etc. ( Matsumoto et al 1994;Larose et al 1998aLarose et al , b, 2003Nagao et al 2003).…”

Section: Simulation Of Two-dimensional Flow Fieldmentioning

confidence: 99%

Investigation of Spatial Coherences of Aerodynamic Loads on a Streamlined Bridge Deck in an Actively-Controlled Wind Tunnel

Zhao

Cao

et al. 2014

Advances in Structural Engineering

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Two-dimensional flow fields were simulated in an actively-controlled wind tunnel by using multiple fans and active-vibration grids. On coming flow features and aerodynamic loads on a streamlined bridge deck section model were measured simultaneously. Experimental result shows that the spatial coherences of on coming flows and aerodynamic loads are both influenced by on coming flow features. Longitudinal and vertical flow features have different effects on spatial coherence of aerodynamic loads. The shape of the spatial coherence function versus frequency curve does not always satisfy an exponential law, but sometimes shows an inverse form in the low-frequency region. A new empirical model is proposed and compared with the traditional exponential one. This new model shows good performance in reflecting spatial coherences of both oncoming flows and aerodynamic forces under different flow conditions.

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Section: Simulation Of Two-dimensional Flow Fieldmentioning

confidence: 99%

Investigation of Spatial Coherences of Aerodynamic Loads on a Streamlined Bridge Deck in an Actively-Controlled Wind Tunnel

Zhao

Cao

et al. 2014

Advances in Structural Engineering

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“…where: V 0 is wind gust speed, calculated in a 3-second interval; S 1 is topographic factor according to the ABNT NBR 6123:1988 [2]; S 3 is statistical factor associated to the destruction probability, according to the ABNT NBR 6123:1988 [2]. Some studies, among others (Nagao et al [20]), assessed the spatial correlation between aerodynamic pressures and revealed that the correlations for the "longitudinal speed fluctuation" did not coincide with the "aerodynamic pressure fluctuation" process. However, in this study, it is assumed that the pressures, which act on the structure, are direct functions of the speed, as in the classic model from Davenport adopted in the ABNT NBR 6123:1988 [2], spectral density and crossing correlation functions are not considered for the pressure fluctuation.…”

Section: Aerodynamic Dampingmentioning

confidence: 99%

Dynamic analysis of a concrete chimney considering the aerodynamic damping

Carvalho

Queiroz

Vilela

et al. 2019

Rev. IBRACON Estrut. Mater.

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Usually, the analysis of structures under wind loading is performed using an equivalent static analysis, where the influence of floating response is taken into account by the gust factor. This methodology can be used in case of rigid structures for not presenting a considerable dynamic response. More flexible structures, in particular those lightly damped, may show an important resonant response and their dynamic properties must be considered in the analysis. The aim of this paper is to present a methodology for dynamic analysis of structures under wind loading considering the geometric nonlinearity, the vibration caused by the kinetic energy of wind gusts and the aerodynamic damping due to the relative movement between this structure and the wind. The formulation proposed is applied to a 180-meter-high concrete chimney and the results were compared with those obtained through the recommendation given in the standard ABNT NBR 6123:1988 [2] for the dynamic structural analysis.

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“…Some studies, among others Nagao et al (2003), assessed the spatial correlation between aerodynamic pressures and revealed that the correlations for the “longitudinal speed fluctuation” did not coincide with the “aerodynamic pressure fluctuation” process. However, in this study, it is assumed that the pressures, which act on the structure, are direct functions of the speed, as in the classic model from Davenport adopted in the ABNT NBR 6123:1988 (1988), spectral density and crossing correlation functions are not considered for the pressure fluctuation.…”

Section: Numerical Procedures For Dynamic Analysis In Cablesmentioning

confidence: 99%

Aerodynamic damping in cables of overhead transmission lines subjected to wind loads

et al. 2018

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Traditionally, the analysis of cables under the influence of wind is performed using an equivalent static analysis. However, the occurrence of countless accidents in structural systems where cables are involved, even in cases where the project speed limit has not been reached, indicates that the collapse may have been caused by dynamic actions or by underestimated values of wind speed. The aim of this article is to introduce a dynamic analysis methodology for cables under the influence of wind and its forces. The validation procedure proposed is performed through a comparison among the results obtained, results from other researches, and wind tunnel experimental results. In parallel, comparison of the results is obtained in both static and dynamic analysis.

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Basic study on spatial correlations of fluctuating lifts acting on plates

Cited by 9 publications

References 5 publications

Investigation of Spatial Coherences of Aerodynamic Loads on a Streamlined Bridge Deck in an Actively-Controlled Wind Tunnel

Investigation of Spatial Coherences of Aerodynamic Loads on a Streamlined Bridge Deck in an Actively-Controlled Wind Tunnel

Dynamic analysis of a concrete chimney considering the aerodynamic damping

Aerodynamic damping in cables of overhead transmission lines subjected to wind loads

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