Analysis of vibration characteristics of the centrifugal pump base on CFD

Marine centrifugal pump is one of the important factors that cause ship vibration, so the research on centrifugal pump vibration is particularly important. In this paper, in order to study the flow-induced vibration characteristics of centrifugal pump, a virtual prototype model of the centrifugal pump is established in finite element method. The theory of Computational fluid dynamics (CFD) is utilized to analyze the inner flow field of the centrifugal pump, and steady-state calculation and transient calculation of the flow field are completed. The fluid forces acquired from the transient calculation results of flow field are used as the excitation loads for the virtual prototype model of the centrifugal pump. The fluid-solid coupling model of the centrifugal pump is built, and the vibration acceleration of the centrifugal pump's foot is calculated, and the flow-induced vibration characteristics of the centrifugal pump are obtained. The data of the centrifugal pump measured in the experiment are consistent with the simulation results. This study provide reference for the fluid-solid coupling method in centrifugal pump fluid field prediction and flow-induced vibration research.