FSI效应对管道水击运动特性的影响分析

Analysis of FSI Effects on Waterhammer Characteristics in Piping Flows

使用哈密顿变分原理和变形体内流体运动的基本方程建立了输流管道流固耦合运动方程 ,由此构造出描述管道波 -流 -振动系统的动力耦合效应的 4 -方程模型 ,并得到了相应的复频解析解 .将该模型与经典模型做了对比分析 ,结果表明 ,改进模型能更好地反映管道水击运动的特性 .

In this paper, the waterhammer FSI equations established by the Hamilton's variational principle and the fluid continuity and momentum equations are used to create a new FSI 4 equation model. This model has a good description of the dynamic coupling effects of the propagating flowing vibrating system on the transients in a pipe. An analytical complex frequency solution of this model was obtained. Comparisons of the present model with the classical one show that the present model is more reasonable due to good prediction of the waterhammer motion characteristics.