模态分析发展至今已有40多年历史,主要方法有:有限元法、基于输入输出模态数据的试验模态分析(Experimental modal analysis,EMA)法和基于仅有输出数据的运行状态模态分析(Operational modal analysis,OMA)法。针对旋转机械转子的模态分析,还包括传递矩阵分析法,因计算时矩阵的阶数不随系统的自由度增大而增加,编程简单,运算速度快而被认可。但在大型复杂旋转机械 Modal analysis has been developed for more than 40 years. The main methods are: finite element method, experimental modal analysis (EMA) based on input and output modal data and modal analysis of operating states based on only output data (Operational modal analysis, OMA) method. Aiming at the modal analysis of rotating machinery rotor, it also includes the transfer matrix analysis method, which is accepted because the order of the matrix does not increase with the increasing degree of freedom of the system, the programming is simple and the calculation speed is fast. But in large complex rotating machinery