边界元法在膜结构与风耦合研究中的应用

徐闻;叶继红;单建

振动与冲击 ›› 2009, Vol. 28 ›› Issue (1) : 123-130.

PDF(3079 KB)
PDF(3079 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (1) : 123-130.
论文

边界元法在膜结构与风耦合研究中的应用

  • 徐闻,叶继红,单建
作者信息 +

The application of BEM in the Membrane structures interaction with air

  • Xu Wen,Ye Jihong,Shan Jian
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摘要

膜结构是一种风敏感性结构,结构与风的耦合作用不容忽视。本文将膜结构所处的风场简化为不可压缩势流,运用边界元法求解绕流后作用在膜结构上的风压,然后计算在风压作用下膜结构产生的变形,修正膜结构形状,再次求解变形后膜结构周围流场及作用在其上的风压,这样依次迭代,直至得到收敛的解。这种方法的有效性通过典型算例和其他方法计算结果的对比得到验证。变换膜结构的矢跨比、初始预张力及风场平均风速,研究参数变化对流固耦合的影响,为膜结构抗风研究与工程实践提供参考。

Abstract

The fluid-solid interaction can not be neglected in the analysis of the membrane structures due to its sensitivity to wind. The flow is treated as incompressible and potential in this paper. Firstly, the wind pressure on the structure is determined by means of the boundary element method (BEM). Afterwards, the structure deformation under the pressure of wind is calculated and then the shape of the membrane structure is modified. Subsequently, using the BEM to calculate the wind pressure, one obtains the deformation of the structure under the pressure that time. This procedure is repeated until the solution is satisfied the convergence criteria. Typical examples have been analyzed which illustrate the method and demonstrate its efficiency and accuracy as compared with other numerical methods. The analysis of the wind-structure interaction has been performed with the method mentioned above, by considering parameters, such as rise-span ratio, prestress and the wind velocity. The results have practical application in wind resistant study and engineering.

关键词

张拉膜结构 / 流固耦合 / 边界元法

Key words

Membrane structures / Fluid-solid interaction / Boundary element method

引用本文

导出引用
徐闻;叶继红;单建. 边界元法在膜结构与风耦合研究中的应用[J]. 振动与冲击, 2009, 28(1): 123-130
Xu Wen;Ye Jihong;Shan Jian. The application of BEM in the Membrane structures interaction with air[J]. Journal of Vibration and Shock, 2009, 28(1): 123-130
中图分类号: O241   

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