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Energy conversion axial impeller axial core component , which is directly related to safety and reliability of safe operation of the pump station . Therefore , its vibration characteristics of fluid-structure interaction analysis for the optimization of axial pump design, stable operation , to prevent accidents has important theoretical and practical engineering significance. This paper studies the axial flow impeller blade stiffness and strength , vibration characteristics and head after deformation impeller , shaft power , efficiency. In this paper, axial flow impeller as the research object , according to the axial flow pump operating conditions , to study the mechanics and mathematical models , stress analysis , boundary conditions and calculation methods applied to simplify and load . Axial blade using ANSYS software for structural calculation and analysis . In the structural analysis process, taking into account the structural characteristics of axial flow blades and nature , using ten nodes SOLID92 unit established finite element model of the blade . Consider the centrifugal force , gravity and flow field generated by the water pressure of the blade on the blade load is applied . Consider the water pressure distribution related to fluid-structure interaction problems , the blades into the CFX software for simulation of the flow field , and then calculate the water pressure on the blade , using APDL parametric design language , automatically loaded. Upon completion of the load applied to the blade after blade based on ANSYS software in different conditions of water stress and strength analysis were carried out just vibration analysis, the strength and rigidity of the blade and other important mechanical properties of modal parameters. The results show that the maximum stress the blade in the blade root inlet side , in the area of stress gradient is large, easy fatigue damage ; while the outer edge of the blade has a certain degree of such stress, the maximum deformation of the part of the blade the outer edge of the blade , that is, this part of the blade vibration sensitive areas. The impeller in the air mode and the impeller and the centrifugal force water pressure modal changes little , that the water pressure and the centrifugal force of the impeller is small modal .
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