Complex modal analysis is then performed to calculate the eigenvalues and eigenvectors, and then modal parameters are obtained.

采用复模态分析求取特征值和特征向量，进而得到系统的模态参数。

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In this paper, a successive approximation procedure for calculating eigenvalues of the complex characteristic equation is proposed.

本文提出了对复变特征方程求根的一种系统逼近程序。

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