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本文采用可作刚度矩阵座标变换并考虑旋转离心体积力的平面应力有限元分析程序,对轴向枞树形透平叶根茂叶轮轮缘的应力状态进行分析研究,得出了此类叶根及轮缘合理结构设计的一些初步结论。文中首先介绍程序编制的主要特点及依据,然后,就两种典型结构的叶根及轮缘在不同受力边界条件下的应力状态作了分析比较,指出在一定条件下,适当减少齿数,增大齿受力面倾角,可以降低叶根及轮缘的应力集中,改善强度特性。此外,还根据计算结果分析了叶型部分离心力负荷在叶根上作用方式对叶根应力状态的影响。
In this paper, the finite element analysis program of plane stress, which can be used as a coordinate transformation of stiffness matrix and taking into account the rotational force of the centrifugal body, is used to analyze the stress state of the flange of the axial-rooted turbine blade impeller. Some Preliminary Conclusions of Rational Design of Rims. In this paper, the main features and basis of programming are introduced firstly. Then, the stress state of blade root and rim in two typical structures under different force-bearing boundary conditions are analyzed and compared. It is pointed out that under certain conditions, Large tooth force surface inclinations, can reduce the stress concentration of the root and rims, to improve the strength characteristics. In addition, according to the calculation results, the influence of the centrifugal force on the root stress state was also analyzed.