中文说明：传递矩阵计算轴的模态，包括模态频率和模态振型
English Description：
The transfer matrix calculates the modal of the shaft, including modal frequency and modal shape
Transfer matrix to calculate the modal of shaft
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中文说明：传递矩阵计算轴的模态，包括模态频率和模态振型
English Description：
The transfer matrix calculates the modal of the shaft, including modal frequency and modal shape