海浪冲击对Y形输液管道流固耦合振动的影响分析

Influence Analysis of Wave Impact on Fluid-solid Coupling Vibration of Y-tube Liquid Pipeline

为研究海浪的周期性冲击对深海中输液管道流固耦合振动的影响,采用FEA方法对内、外流体单独作用以及共同作用下Y形管道系统结构分支处的振动特性进行仿真分析。结果表明:海浪的周期性冲击载荷加剧了管道系统分支处内部流体的压力波动、增大了分支处结构振动的最大位移量和其所承受的最大等效应力;随着内流体压力波动的加剧,管道分支处振动的最大位移量和其所承受的最大等效应力均先减小到一定值再增大;海浪的冲击频率与内流体压力波动、管道分支处振动的最大位移量与其所承受的最大等效应力,均呈正比例关系。

In order to study the influence of periodic wave impact on fluid-solid coupling vibration of deep sea liquid pipelines,Finite Element Analysis(FEA)method is used to simulate and analyze the vibration characteristics of the branches of Y-tube pipeline system under the separate action of internal and external fluids and the combined action.The results show that:The periodic impact load of wave aggravates the pressure fluctuation of the fluid in the pipeline system,the maximum displacement of the vibration of the pipeline system and the maximum equivalent stress of the pipeline system are increased.As the fluctuation of internal fluid pressure increased,the maximum displacement of the vibration of the pipeline system and the maximum equivalent stress of the pipeline system both decrease to a certain value before increasing.The impact frequency of the wave,the fluctuation of internal fluid pressure,and the maximum displacement of the vibration of the pipeline system are all in direct proportion.