海水泵出口管路振动特性分析

Analysis on Vibration Characteristics of Outlet Pipeline for Sea Water Pump

管路在船舶上广泛存在,一般通过管道附件相互连接,组成管路系统。但是由于船舶运行工况的改变,管路中的流体湍流压力波脉动和管路结构之间容易发生耦合,从而引起管路系统的振动与噪声,对船舶设备的性能和安全提出挑战。本文以海水泵出口L型弯管段为研究对象,基于流固耦合理论,采用ANSYS Workbench仿真软件,分析其在管内海水瞬时压力脉动激励下发生的振动特性。最后基于谐响应分析结果,对管路特定部位加装弹性支架以实现船舶管路系统的减振降噪效果。

Pipelines are widely available on ships and are generally connected with each other through pipeline accessories to form a pipeline system.However,due to the change of ship operating conditions,the fluid turbulent pressure wave pulsation in the pipeline is easily coupled with the pipeline structure,which causes the vibration and noise of the pipeline system,and challenges the performance and safety of the marine equipment.This chapter takes the L-shaped bend section at the outlet of the sea water pump as the research object.Based on the fluidstructure coupling theory,ANSYS Workbench simulation software is used to analyze the vibration characteristics of the L-shaped bend section under the instantaneous pressure pulsation of seawater in the pipe.Finally,based on the harmonic response analysis results,the elastic support is added to the specific part of the pipeline to achieve the vibration reduction effect of the ship pipeline system.