【摘要】 依据风机叶轮具有的旋转对称性，用 Ｃｎ 群的表示理论，导出了群各不可约子空间的特征方程，方程的阶数低，易计算，更便于工程应用，且群论方法可以给出叶轮的模态特征更多还原

【Abstract】 Based on the rotary symmetry of a fan impeller, the characteristic equations of the impeller in each irreducible subspace are derived in the paper by using the Cn group representation theory. Because the order of the equations is quite low so they are easy to compute and convenient to use in engineering applications. In addition, the modal characteristics of the structure can also be obtained by the method.更多还原