Additive Mass Method for Dynamical Property of the Fixed Parts of Francis Turbine

In this paper,a new and simplified calculation method is proposed for the additive mass of Francis turbine's fixed parts.Through inducing mass element to the governing equation of fixed part structure of finite element method,the fluid-solid interaction effect of the structure is calculated by using additive mass model.The result is compared with calculation model of pressure-displacement format.The method of this paper is proved to be feasible according to the comparison.