流体瞬变对输流曲管位移影响研究

简要地介绍了当前曲管动力特性的分析方法，采用有限元法实现了管壁与流体的耦合，给出了管道流固耦合的有限元方程，针对90度的曲管，设定了管端入口处的冲击流速，研究了流体速度瞬变过程中曲管的位移特性，在流速变化及流速稳定阶段，分别对两端固支及悬臂曲管模型的管壁节点在不同时刻的坐标轴不同方向的位移进行了比较，判断出曲管节点位移随时间和速度的变化趋势以及位移极值出现的位置，这可为进一步的管道及管路系统的振动噪声研究及设计提供参考。

Research on Displacement of Curved Pipes Induced by Transient Flow

The present analytical methods of dynamic characteristics about curved pipes are introduced in brief.Interaction between pipe walls and fluid is achieved by using the finite element method and equations of the finite element method are presented.The impact velocity of the liquid at the end of the 90 degree curve pipe is initialized and research is done on the displacement property during the procedure of transient flow.In different stages of variable and stable flow velocity,the displacements of the nodes i...