在此基础上，介绍了由频响数据识别复模态参数的导纳圆拟合法。
On this basis, the mobility circle fitting method for identifying the complex modal parameters from frequency response data is discussed.
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.
应用上述方法对悬臂约束阻尼层梁的复模态参数进行了分析，并进行了实验验证。
The method has been applied to the complex model analysis of a sandwich cantilever beam with viscoelastic damping material core and verified experimentally.
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