Numerical Calculation on Wind-induced Damping of Membrane Structure Based on Fluid- structure Interaction
Dan Lu 1 Wenjuan Lou 2 Yi Yang 3
Author information+
1. Shanghai Xian Dai Architectural Design (Group) Co., Ltd，Shanghai，200041, China；2. Department of Civil Engineering, Zhejiang University, Hangzhou 310027 ,China;3. China Railway Eryuan Engineering Group Co.Ltd，Chengdu，610017，China
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History+
Received
Revised
Published
2012-02-07
2012-04-10
2013-03-25
Issue Date
2013-03-25
Abstract
According to the theory of triangle barycentric coordinate system, the new method, which is based on fluid-structure interaction to calculate the fluid-structure interaction grid coordination interpolation, improved the calculation efficiency. But for solving instability problem caused by the large acceleration of flexible construction, it is resolved by solving alternately and repeatedly between fluid and construction on one time step to acquire stable timing solution. The result of the application of above method in the analog calculation on wind-induced response of one flexible flat roof building, is verified to be reliable by comparing with wind tunnel test, and fairly comprehensively demonstrated the actual act of construction under the wind effect. On the basis, it uses EMD,RDT and HT to retrieve the construction FFD characteristic information from the building dynamic response timing data. The analysis result shows that the wind induced effect on flexible construction in wind vibration is very important, mainly because the damping ratio of all round-enclosed construction is far smaller than the windward opening construction’s, and the change of aerodynamic damping with the wind in an all round enclosed conditions is small. As a result, the effect to the sum of the dampings is comparatively small. On the other hand, the change of aerodynamic damping with the wind in windward opening conditions is relatively large, and is increased with the wind. Thereby, for the small damping flexible constructions, especially for the openning constructions, the effect of aerodynamic damping is important.
Dan Lu Wenjuan Lou Yi Yang .
Numerical Calculation on Wind-induced Damping of Membrane Structure Based on Fluid- structure Interaction[J]. Journal of Vibration and Shock, 2013, 32(6): 47-53
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