An experimental investigation of wind-induced ovalling oscillations of thin, circular cylindrical shells

Uematsu, Yasushi; Uchiyama, Kazuo

doi:10.1016/0167-6105(85)90083-2

Cited by 12 publications

(3 citation statements)

References 8 publications

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“…Ovalling is still an issue today with constructions of ever lighter materials such as liquid-storage tanks and silos [124,255,256]. As pointed out in the introduction (chapter 1), ovalling is also highly relevant during construction phases of such buildings and also for the design of solar updraft towers [169,218].…”

Section: The Ovalling Phenomenonmentioning

confidence: 99%

Wind-structure interaction simulations of ovalling vibrations in silo groups

Hillewaere

Degroote

Lombaert

et al. 2015

Journal of Fluids and Structures

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Section: The Ovalling Phenomenonmentioning

confidence: 99%

Wind-structure interaction simulations of ovalling vibrations in silo groups

Hillewaere

Degroote

Lombaert

et al. 2015

Journal of Fluids and Structures

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“…Michalski et al (2011) suggested that particular transient wind loads could lead to dynamic amplification of the structural response; they developed a CFD method to simulate the wind induced response of a real-scale flexible 29 m umbrella in a natural wind flow. Uematsu and Uchiyama (1985) and Uematsu et al (2001) investigated the wind load on a thin circular cylindrical shell and found that the occurrence of vibration altered the characteristics of the pressure fluctuations on the structure to a great extent, even when the amplitude was quite small.…”

Section: Introductionmentioning

confidence: 99%

Research on the wind-induced aero-elastic response of closed-type saddle-shaped tensioned membrane models

Chen²,

Sun

2015

J. Zhejiang Univ. Sci. A

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Abstract:The aero-elastic instability mechanism of a tensioned membrane structure is studied in this paper. The response and wind velocities above two closed-type saddle-shaped tensioned membrane structures, with the same shape but different pretension levels, were measured in uniform flow and analyzed. The results indicate that, for most wind directions, several vibration modes are excited and the amplitude and damping ratio of the roof slowly increase with the on-coming flow velocity. However, for particular wind directions, only one vibration mode is excited, and the amplitude and damping ratio of the vibration mode increase slowly with the on-coming flow velocity. The aero-elastic instability is caused by vortex-induced resonance. On exceeding a certain wind speed, the amplitude of the roof vibration increases sharply and the damping ratio of the vibration mode decreases quickly to near zero; the frequency of the vortex above the roof is locked in by the vibration within a certain wind velocity range; the amplitudes of the roof in these wind directions reach 2-4 times the amplitudes for other wind directions. The reduced critical wind speeds for the aero-elastic instability of saddle-shaped membrane structures at the first two modes are around 0.8-1.0.

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“…Concerning the phenomena of the vibrations in a thin cylindrical shells such as silos (due to the wind ovalling oscillations), Katsura (1985) and Uematsu et al (1985) proposed some analytical models.…”

Section: External Wind Loads Under Steady and Unsteady Flow Conditionsmentioning

confidence: 99%

Aerodynamic loads on bluff bodies under wind gusts

Chevula¹

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This Doctoral dissertation has been focused to study the unsteady aerodynamic loads on bluff bodies.To this aim the following points have been identified and analyzed:Characterization of the flow measured with different types of Pitot tubes and hot wire anemometer at unsteady flow conditions generated by a gust wind tunnel.  Design and integrating of the experimental setups required to measure the internal and external wind loads acting on bluff bodies at gusty wind flow conditions.  Implementation of semi-empirical mathematical models based on potential flow and relevant phenomenological theories to simulate the experimental results.  At various gusty flow conditions, extracting and analyzing the influence of parameters obtained from the developed theoretical models.  Empirical estimations are proposed to find out suitable values of the influencing parameters, by fitting the experimental and theoretically predicted results. The experimental setups are performed in an open circuit, closed test section, low speed wind tunnel, with a new sinusoidal gust generator mechanism concept, designed and built at the

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An experimental investigation of wind-induced ovalling oscillations of thin, circular cylindrical shells

Cited by 12 publications

References 8 publications

Wind-structure interaction simulations of ovalling vibrations in silo groups

Wind-structure interaction simulations of ovalling vibrations in silo groups

Research on the wind-induced aero-elastic response of closed-type saddle-shaped tensioned membrane models

Aerodynamic loads on bluff bodies under wind gusts

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