Abstract: In order to improve the processing quality of hydraulic turbine blade,static and dynamic finite element analysis on saddle of the hydraulic turbine blade processing machine tool was carried out. Through conducting three-dimensional modeling and mesh generation on the saddle of a hydraulic turbine blade processing machine tool,a simulation model of saddle was built in according to the load and constraint in the machine tool saddle’s practical operating condition.On the basis of the saddle’s simulation model,the static stiffness and modal properties was studied.The accuracy of the modal analysis results was verified by experiment.The static and dynamic finite element analysis on hydraulic turbine blade processing machine tool’s saddles has provided helpful references for the structural optimization design of saddles.

Key words: hydraulic turbine blade, machine tool, saddle, finite element analysis, modal analysis