关键词: 边界元法, 有限元法, 应力分析, 压气机轮盘, 孔

Abstract: Boundary elemem method (BEM) is used to calculate the stresses near the hole of a compressor disk. Since the disk is axisymme-trical, one sector of the disk with a hole is chosen and the numerical results of FEM are used as the boundary conditions ol the sector. The numerical results of BEM are compared with those of FEM. The result shows that when BEM is applied, the data to be prepared is less but more convenient; the choice of the points to be calculated is more flexible, the numerical precision is better. In order to obtain the stresses on the boundary, the 2nd finite difference approach equation for the constant element is derived as well.

Key words: boundary element method, finite element method, stress analyses, turbine disk, hole