对称部分是实模态摄动，反对称部分是复模态摄动。

The symmetric perturbation is of real mode and the antisymmetric is of complex mode.

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讨论了阻抗参数与导纳参数，复模态参数与实模态参数的转比关系；

Then, the transformation equations relating physical parameters with admittance parameters and those relating complex modal parameters with real ones were determined.

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对粘性比例阻尼与一般粘性阻尼两种情况分别进行了多自由度系统的实模态与复模态分析。

The real modal analysis and complex modal analysis are respectively applied to the multi-degree-of -freedom system according to the different damp.

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