The symmetric perturbation is of real mode and the antisymmetric is of complex mode.
对称部分是实模态摄动，反对称部分是复模态摄动。
Finally, many complex mode shape derivatives of high accuracy can be obtained by decomposing system matrices only once.
该方法仅需进行一次系统矩阵的分解就可获得高精度的多个复振型导数。
The complex mode theory is presented, with analysis of the characteristics of the free vibrations of these systems in the complex eigenvector space.
阐述了复模态理论，分析了系统自由振动在复特征向量空间内的特性。
The proposed approach can offer an exact solution for dynamic response of base-isolated structure, through using the complex mode superposition method.
利用复数振型叠加法，这种求解方法能够得出结构动力响应的精确解。
This paper presents a new method of analyzing locomotive lateral stability, that is, the critical velocity is calculated by use of the complex mode matrix perturbation theory.
本文提出一种分析机车横向运动稳定性的方法，即利用复模态的矩阵摄动法来计算临界速度。
It is found that the system is subjected to the low-frequency excitation and occurs random vibration in the non-linear complex-mode form.
揭示了系统所受的是低频激励，以非线性复模态的形式作随机振动。
It is found that the system is subjected to the low-frequency excitation and occurs random vibration in the non-linear complex-mode form.
揭示了系统所受的是低频激励，以非线性复模态的形式作随机振动。
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