流固耦合效应对输液管道的振动影响研究

Effect of the fluid structure interaction for fluid pipeline impact and study

压力管道系统中存在流体和结构之间的耦合振动。在考虑流固耦合效应的情况下,应用ADINA中流固耦合分析求解器ADINA-FSI,建立了输液管道的直管有限元模型,介绍了管壁模型和流体模型的建模过程以及流固耦合计算过程、压力突变和约束的施加以及模型参数选择等。依据仿真结果,分析了压力突变、管道模型和简支等因素对管道振动的影响。有压流动对管道横向和轴向振动的影响受到支承条件的影响,固支数量的增多有助于消减压力突变等因素引起的管道振动,管道及流体参数的合理选取等也对振动有重要影响。

The vibration between fluid and structural were presented in conveying fluid piping system.Based on the Fluid Structure Interaction（FSI） theory,a finite element model was established for long straight conveying fluid piping system by using ADI-NA-FSI analysis solver.The processes of pipe modeling and fluid modeling、FSI computing process、pressure jump、the selection of boundary condition and model parameter were considered.According to the result of computer simulation,influence factors foregoing were proved：the vibration was effected by the supporting condition on both the axial direction and radial direction;the decrease of pressure jump is accompanied by raising the number of simply supporting;the vibration was impacted with proper selection of the pipe and fluid parameters.