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研究了阻尼系统振动分析的复模态矩阵摄动法，推导了孤立特征值及重特征值情况的一阶、二阶摄动公式，特别是通过引进１个非常简单的范化条件，就完全确定了现有方法中的有关摄动项的不确定量．并且给出了相应的算例．
The complex mode matrix perturbation method for the vibration analysis of damping system is studied. The first and second order perturbation formulas for isolated eigenvalues and eigenvalues are deduced. Especially with the introduction of a very simple normalized condition, The uncertainty of the perturbation term in the existing method is confirmed. And gives the corresponding example.