Modal Analysis Based on Fluid-Structure Interaction of Axial Flow Rotor

In order to study the impact of prestress and aqueous medium for axial pump flow rotor modal ，in this paper, with a axial flow model test of North Water Diversion Project, the flow of aqueous medium modal distribution of axial flow rotary mechanism was calculated through the coupling APDL command stream in ANSYS WORKBENCH with the basic idea of Fluid-structure interaction，and axial flow changes of impeller modal in aqueous medium and in the air was compared under prestressed case; the load of prestressed modal of the rotation for the entire organization was calculated through the one-way coupling method . The results show that the water medium has a significant decreases to the natural frequency of the impeller, while the impact of the prestress for modal is not obvious.