Abstract: In order to solve the problem of asymmetric distributed loads on curving areas, and improve the efficiency and quality in complicated products finite element method (FEM) analysis, the method for asymmetric distributed loads on curving areas based on the eigenfunction distribution of FEM is put forward. The basic concept of loading eigenfunction is presented. The loading of asymmetric distributed loads on unrestricted curving areas and cylindrical areas is researched. The curving areas are discretized into small-unit grids. The load on the grids (or nodes) of unrestricted curving areas can be calculated automatically according to the eigenfunction of load distribution and the shape of curving areas. The method is proved to be steady and reliable through the experiment of putting the asymmetric distributed loads on the impeller curving areas. The loading of asymmetric distributed loads on unrestricted curving areas and cylindrical areas can be implemented faster by using this method, and the FEM analysis of uneven surface load in complicated products can be solved effectively.

Key words: Dispersion to load, Eigenfunction, Finite element method, Simulation analysis, Unrestricted curving areas