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.
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.
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.
求解有阻尼多自由度结构系统的振动微分方程，实模态分析法是得到广泛应用的一种有效方法。
The dynamic response of the damping multi-DOF structural system is usually calculated by the real modal analysis method.
探讨了强迫解耦法的误差来源，并对采用基于实模态的拟力迭代方法提高其精度的措施进行了讨论。
Furthermore, the errors of the forced uncoupling method and the measures of improving its precision by using pseudo-force iteration method based on real modes are discussed.
在识别中采用了实模态识别法，识别出前13个模态参数，并与稳态激振、环境振动及有限元计算进行了比较，结果是比较符合的。
Real modal parameter identification has been used and 13 modes are identified. The obtained modes are compared with the results from steady exciting, ambient vibration and FEM calculation.
弹性介质刚度不仅对充液圆柱壳的实固有频率影响显著，而且影响其截止轴向模态。
The rigidity effect of surrounding elastic medium is remarkable not only to the real characteristic frequencies of cylindrical shells but also to the cut-off axial mode.
基于随机李亚普诺夫函数的方法，并结合线性矩阵不等式，分别提出依赖于模态的状态反馈和输出反馈控制，以保证相应闭环系统的严格正实性。
Based on stochastic Lyapunov functional approach, both state and output-feedback mode-dependent controllers are proposed to guarantee the strict positive realness of the resulting closed-loop systems.
基于随机李亚普诺夫函数的方法，并结合线性矩阵不等式，分别提出依赖于模态的状态反馈和输出反馈控制，以保证相应闭环系统的严格正实性。
Based on stochastic Lyapunov functional approach, both state and output-feedback mode-dependent controllers are proposed to guarantee the strict positive realness of the resulting closed-loop systems.
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