基于Workbench的输流弯管流固耦合分析

Fluid-solid Coupling Analysis of Fluid-conveying Pipe Based on Workbench

运用ANSYS Workbench软件建立不同弯曲半径的弯管模型,分析了弯曲半径对所受流体压力以及内部流速分布的影响,得到了弯曲半径和管道入口压强对固有频率和整体变形的关系。结果表明:弯曲半径对流速分布影响显著,弯头处内侧流速大,外侧流速小;弯曲半径对弯头后段内壁压力影响显著;弯头处内侧受压小,外侧受压大;弯曲半径对整体变形的影响较小,而管道入口压强对整体变形的影响大;管道2、3阶固有频率随着弯曲半径的增大有下降趋势,随着弯曲半径的增大4阶固有频率增大明显。

Use ANSYS Workbench to establish bend pipe model with different bending radii,the study analyzes and discusses the influence of the bending radius on the fluid pressure and the internal flow velocity distribution.It reached the inherent relationship of the bending radius and the inlet pressure of the pipe effects of frequency and overall deformation.The results show that the bending radius has a significant effect on the velocity distribution.The inside velocity at the elbow is large,while the outside velocity is small.The bending radius has a significant impact on the inner wall pressure at the rear of the elbow.The effect of the overall deformation is small,and the pressure at the inlet of the pipeline has a large effect on the overall deformation.The natural frequencies of the 2nd and 3rd order of the pipeline decrease with the increase of the bending radius,and the natural frequencies of the 4th order increase significantly with the increase of the bending radius.