101. Experimental studies on the flutter behaviour of membranes in a wind tunnel

Minami, Hirokazu; Okuda, Y.; Kawamura, Sumio

doi:10.1680/ss4v1.19683.0101

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…5 The essence of aeroelastic instability of membrane structure is related to the total damping. [6][7][8] In other words, when the energy generated by wind load is higher than that consumed by membrane structure itself, the aeroelastic instability will occur in membrane structure. As an important factor affecting the wind-induced catastrophe of tension membrane structure, it is necessary to conduct a comprehensive and in-depth study on the damping performance of the coated fabric membrane.…”

Section: Introductionmentioning

confidence: 99%

“…At present, the researchers have made significant progress on the mechanical properties of architectural coated fabrics, including the basic mechanical properties of membranes, environmental impact, and durability 5 . The essence of aeroelastic instability of membrane structure is related to the total damping 6–8 . In other words, when the energy generated by wind load is higher than that consumed by membrane structure itself, the aeroelastic instability will occur in membrane structure.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic mechanical properties of architectural coated fabrics under different temperature and excitation frequency

Zhang

et al. 2020

Polymer Composites

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The dynamic thermo-mechanical analysis test is performed on the architectural coating fabric based on the dynamic thermo-mechanical analyzer (DMA). The effects of excitation frequency, constant temperature, and dynamic temperature on the dynamic mechanical properties of architectural membrane materials are discussed. Through analysis and discussion, the various rules of damping loss factor, loss modulus, and storage modulus of architectural membrane materials in the application temperature and frequency range are obtained. As the frequency of the external excitation force increases, the storage modulus, loss modulus, and loss factor all increase, while the influence of temperature is nonlinear. Under the action of dynamic temperature and constant temperature, the difference between storage modulus and loss modulus is obvious, but the difference of loss factor is small. Due to the anisotropy of the polyester fiber substrate, the damping characteristics of the membrane material in the warp and weft yarns are different regardless of the effect of external excitation frequency or temperature. The discussion in this article provides a theoretical basis for further research on the damping characteristics of membrane materials and the vibration response of membrane structures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical properties of architectural coated fabrics under different temperature and excitation frequency

Zhang

et al. 2020

Polymer Composites

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“…For example, Minami et al (1993) studied the vibration behavior of a one-way tensioned membrane and defined the state of membrane vibration with progressive waves as flutter. Sygulski (2007) investigated the stability of a two edge supported latex rubber membrane and found that the membrane vibrated like a standing wave and exhibited a three half-wave mode shape.…”

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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“…§ Método da relaxação dinâmica, onde na obtenção do equilíbrio da membrana, resolve-se o problema como um problema dinâmico(BARNES, 1994). importante ressaltar que o efeito do vento em estruturas flexíveis, tais como as estruturas de membrana, é diferente do efeito do vento em estruturas rígidas convencionais(MINAMI et al, 1993). SRIVASTAVA & TURKKAN (1995) apresentam o estudo experimental em túnel de vento em estruturas de membrana e TURKKAN & SRIVASTAVA (1995) mostram que o método das redes neurais pode ser usado para a definição da pressão do vento em estruturas pneumáticas.…”

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Estudo das estruturas de membrana: uma abordagem integrada do sistema construtivo, do processo de projetar e dos métodos de análise

Oliveira

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101. Experimental studies on the flutter behaviour of membranes in a wind tunnel

Cited by 5 publications

References 4 publications

Dynamic mechanical properties of architectural coated fabrics under different temperature and excitation frequency

Dynamic mechanical properties of architectural coated fabrics under different temperature and excitation frequency

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

Estudo das estruturas de membrana: uma abordagem integrada do sistema construtivo, do processo de projetar e dos métodos de análise

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