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为了提高发动机风扇盘二维有限元模型应力分布的精确度,选择典型的三辐板结构,利用ANSYS 12.0完成三辐板风扇盘三维结构的有限元建模.同时建立三辐板风扇盘的二维轴对称有限元模型,将非轴对称载荷分解成傅里叶级数,并求解了其径向应力、周向应力和等效应力,对比了传统的二维分析、非轴对称加载二维与三维分析的结果.结果表明:施加均布载荷的二维模型应力分布与三维模型的应力分布情况相差较远,施加非轴对称载荷的二维模型的应力分布与三维模型的应力分布情况较为接近.与只施加均布载荷的方法相比,本方法提高了发动机风扇盘二维有限元模型应力分布的准确性.
In order to improve the accuracy of the stress distribution of the two-dimensional finite element model of the engine fan disk, the typical three-spoke structure is selected and the finite element modeling of the three-disc fan disk with ANSYS 12.0 is completed. Dimensional axisymmetric finite element model, the non-axisymmetric load is decomposed into Fourier series, and the radial stress, circumferential stress and equivalent stress are solved. Compared with the traditional two-dimensional analysis, non-axisymmetric loading two-dimensional And the result of three-dimensional analysis. The results show that the stress distribution in the two-dimensional model with uniform load is far from the stress distribution in the three-dimensional model. The stress distribution in the two-dimensional model with non-axisymmetric load and the three-dimensional model are more Compared with the method of applying uniform load only, the method improves the accuracy of the stress distribution of the two-dimensional finite element model of the engine fan disk.