【摘要】 利用三维有限元模型，对离心压缩机叶轮由于离心力引起的应力及其自由振动的固有频率进行了计算。采用的是２０ 节等参元，利用离心压缩机叶轮形状与载荷周期性循环对称的特点，通过引入周期性边界条件，将计算化为针对叶轮的一个叶道进行。最后，通过计算一个实际的叶轮，对该方法进行了验证。更多还原

【Abstract】 A three dimensional finite element method was used to calculate the static stress and natural vibrations of a centrifugal impeller. According to its cyclic structural and load conditions, the calculation was simplified to calculate one sector of the impller ones. An improved subspace method was presented to solve complex hermit eigenvalue problem in the dynamic analysis. The method was verified through analysing an actual impeller.更多还原