基于改进涡方法的膜结构流固耦合研究

丁静鹄;叶继红

振动与冲击 ›› 2013, Vol. 32 ›› Issue (24) : 61-69.

PDF(2131 KB)
PDF(2131 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (24) : 61-69.
论文

基于改进涡方法的膜结构流固耦合研究

  • 丁静鹄,叶继红
作者信息 +

Interaction between membrane structure and wind based on modified vortex method

  • Ding Jinghu, Ye Jihong
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文章历史 +

摘要

采用改进涡方法对膜结构的流固耦合进行模拟。将非协调边界元计算势流的方法引入到传统涡方法中,即为改进涡方法。该算法可以精确计算三维粘性、不可压缩流场。采用改进涡方法可以得到每个时间步膜结构的单元节点流场压力,通过与ansys有限元模型提取出的整体刚度矩阵联合求解得到单元节点位移,并可以由单元节点位移求解出下一时间步的流场分布。由于本文引入了高效的预处理循环型广义极小残余迭代算法(GMRES),使得边界元法的优势得到了充分发挥,大幅度节省了计算时间。完成了方形平屋盖膜结构气弹模型风洞试验。采用本文算法对膜结构流固耦合效应计算得到的位移均值大部分与风洞试验吻合,计算结果表明本文提出的方法是模拟膜结构流固耦合问题的有益尝试。

Abstract

Modified vortex method, which introduced the discontinuous boundary element method into the conventional vortex method, is employed to simulate the interaction between membrane structures and wind. Three-dimension viscosity and incompressible flow fields can be simulated more accurately via this method. The flow field pressures of all element node for membrane structure at every timestep is got by the modified vortex method, and combine with the entire stiffness matrix draw from finite element model to calculate the displacement of element nodes, and further gets the flow field at next timestep. The pre-conditioning GMRES(the generalized minimum residual) iterative algorithm is also imported into the present study, and takes full advantage of the boundary element method. The wind tunnel vibration experiments on square flat membrane structure is concluded. The mean value of displacement for interaction between membrane structure and wind, is calculated by modified vortex method, and are in good agreement with the results of wind tunnel testing. It also indicates the modified vortex method is a useful attempt at to simulate the process of interaction between membrane structure and wind.



关键词

膜结构 / 改进涡方法 / 流固耦合 / 数值模拟 / 气弹风洞试验

Key words

membrane structure / modified vortex method / fluid-structure interaction / numerical simulation / aeroelastic wind tunnel testing

引用本文

导出引用
丁静鹄;叶继红. 基于改进涡方法的膜结构流固耦合研究 [J]. 振动与冲击, 2013, 32(24): 61-69
Ding Jinghu;Ye Jihong. Interaction between membrane structure and wind based on modified vortex method[J]. Journal of Vibration and Shock, 2013, 32(24): 61-69

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