大跨度骨架式膜结构风振响应分析

Wind-induced Vibration Analysis of a Long-span Framework Membrane Sturcture

介绍了达州体育场大跨度骨架式膜结构工程的抗风设计及风洞试验研究,给出了该结构的平均风压系数参考值。在抗风设计中,运用ANSYS有限元程序,采用体型系数表达的空气动力模型,对结构进行了横向风振响应时程的非线性分析,根据得出的整个风振响应时程曲线,得到该结构产生驰振失稳时的临界风速,通过与设计风速的比较,表明在风荷载作用下,该结构是安全的。

The wind-induced vibration analysis and the research about the wind tunnel experiment results are presented,which are beth used in the design and control of the behavior of membrane structure with long-span framework used in Dazhou stadium. A time-history analysis of the structure on the wind-induced vibration response in transverse direction is implemented with ANSYS program,in which the applied aerodynamic force is expressed in terms of shape co-efficient. And the critical wind velocity at which the structure would lose the dynamic stability is obtained according to the whole history vibration curve. After the comparison with the design velocity, a safety conclusion is got.