Fluidstructure interaction vibratingproperties simulation of Kaplan turbine runner blade

aking the Liutangba bulb Kaplan blade as an example, the paper calculated the eigenfrequencies and mode shapes of the blade both vibrating in air and in operating flow path (the runner blade fluidstructure interaction equations are deduced by the authors). The blade resonance probability in stable operation condition is also analyzed. It is essential to do resarch on the eigenfequencies, mode shapes and resonance analysis of runner blade in operating flow path. The method used in the paper has distinct features from others. The fluidstructure interaction vibrating analysis method is also effective in other types of hydraulic runner blades.