Study on the Fluid-Structure Interaction of ETFE Cushions Under Uniform Flow Field

Xiaofeng Wang; Yuqing Zhang; Qingshan Yang

doi:10.13206/j.gjgSE20041902

Volume 35 Issue 7

Oct. 2020

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Xiaofeng Wang, Yuqing Zhang, Qingshan Yang. Study on the Fluid-Structure Interaction of ETFE Cushions Under Uniform Flow Field[J]. STEEL CONSTRUCTION(Chinese & English), 2020, 35(7): 29-42. doi: 10.13206/j.gjgSE20041902

Citation:

Xiaofeng Wang, Yuqing Zhang, Qingshan Yang. Study on the Fluid-Structure Interaction of ETFE Cushions Under Uniform Flow Field[J]. STEEL CONSTRUCTION(Chinese & English), 2020, 35(7): 29-42. doi: 10.13206/j.gjgSE20041902

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Study on the Fluid-Structure Interaction of ETFE Cushions Under Uniform Flow Field

doi: 10.13206/j.gjgSE20041902

1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
2. School of Civil Engineering, Chongqing University, Chongqing 400044, China

Funds:

This research is sponsored by the general project (51778041) from National Natural Science Foundation of China.

Received Date: 2019-08-27

Abstract

Abstract

ETFE (Ethylene-Tetra-Fluoro-Ethylene) cushions are popularly used in large-span steel structures such as National Swimming Center, etc. Due to flexibility and wind-sensitivity, ETFE cushions under wind often suffer large deformation and vibration, which, however, further changes the surrounding wind field and therefore its action on the enveloping membrane, causing a significant fluid-structure interaction. The fluid-structure interaction can be characterized by the effects of change in the structural shape, added mass, aerodynamic damping and pneumatic stiffness. So far, the literature only focused on the fluid-structure interaction of tensioned membrane structures under uniform flow and the research on inflated membranes such as ETFE cushions still remains untouched. In view of this, this paper aims to numerically explore the fluid-structure interaction of ETFE cushions under uniform flow and its effect on the dynamic responses by comparing the results from the CFD/CSD (computational fluid dynamics/computational structure dynamics) analysis and the FSI (fluid-structure interaction) analysis. Since aerodynamic damping is not included in the analysis and pneumatic stiffness can be considered with the potential flow element in the CSD module of ADINA, attention is only paid in the paper to the influences of the change in the structural shape and added mass. The results indicate that the effect of FSI has a slight effect on the wind pressure but plays a significant role in the dynamic responses of ETFE cushions.
- ETFE cushions,
- fluid-structure interaction,
- uniform flow field,
- added mass,
- change in the structural shape

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References(23)

References

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