系数矩阵、硬地层和软地层声波频散（频率和速度）曲线。-The coefficient matrix, the hard formations soft formations acoustic dispersion curve (frequency and speed).

为了解决空心圆管的频散曲线求解。但没有涉及到复数(In order to solve the dispersion curve of the hollow tube. But did not involve the plural)

兰姆波相速度频散曲线的绘制（横轴为频厚积，纵轴为相速度），各模态的频散数据均可以导出。(Lamb wave phase velocity dispersion curve(The transverse axis is frequency-thickness products, and the vertical axis is phase velocity),and the dispersion data of each mode can be derived.)