| This thesis is supported by the National Natural Science Foundation of China (50379044). Rigidity, strength and vibration analysis are important to the blade of hydrodynamic turbine, both in theoretical and actual fields, such as optimum design, stable operation and damage preventing. This thesis aims at developing a model and calculation method of rigidity, strength and vibration of the blade.First of all, finite element motion and static equations of blade under centrifugal force are derived in according with geometric and operating character of the blade. Finite element model of the blade is presented using 8-node hexahedron element. Centrifugal force, gravity and water pressure are considered in the calculation model. Navier-Stokes equations and standard k - e turbulence model are used to calculate water pressure on the runner based on the fluid software CFX. Then the result is loaded on the finite element model by some means to solve the system of equations. Secondly, equation of blade vibration frequencies are derived. The frequencies and vibration state of blade in the water are calculated by fluid-solid couplingtheory. The factors that are influential in vibration are analyzed by making a comparison between two results of vibration character. In order to analyze rigidity, strength and the blade using finite element method, pre-processing and post- processing are necessary on the basis of ANSYS software. According to models and methods above, correction of models used is verified by calculation examples and the analysis of blade. Guides are supplied to engineering and safe operation of water turbine generator set.
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