河道内构筑物承载的流固耦合研究  

Study on Bearing Capacity of River Structure Using Fluid-solid Coupling Method

作　　者：张昆明[1] 许志沛[1] 王玉柱[1] 

机构地区：[1]西南交通大学机械工程研究所,成都610031

出　　处：《机械科学与技术》2014年第5期643-646,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：中央高校基本科研业务费专项资金项目(2011ZT03)资助

摘　　要：利用有限元软件ANSYS中的流体计算模块CFX和Workbench平台对受流体作用的河道内构筑物进行了流固耦合分析,显著减少使用以往理论公式带来的计算误差,精确、有效地对模型进行了仿真。通过CFX计算求得流体作用力,然后利用Workbench将其以插值方式传递到构筑物上进行固体分析计算,最后得到物体在流体作用下的变形和应力分布。分析了高雷诺数下,圆柱自由表面绕流模型作用在柱身上的流体作用大小和分布状态。结果表明:流体压力沿高度方向近似线性增长,沿圆柱截面方向先减小后增大。The fluid-solid coupling of the river structure was analyzed utilizing the computational fluid module CFX and the Workbench platform in Ansys software. The coupling analysis method in this paper could simulate the modal accurately and effectively,and reduce the calculation error significantly compared with the previous theoretical formula methods. In this method,the fluid force was calculated through CFX; then Workbench delivered the fluid force to the structure by the interpolation method; finally the deformation and stress distributions of the structure were obtained through solid mechanics analysis. This paper also analyzed the size and distribution of the fluid force that acts on the pillar which has the high Reynolds number and free surface flow around cylinder. The result shows the fluid pressure increases approximately linear along the height of the pillar,and decreases firstly then increases along the cylindrical section.

关 键 词：河道构筑物 承载 高雷诺数 流固耦合 圆柱绕流 

分 类 号：TV311[水利工程—水工结构工程]