对一个包含固定结合面的具体结构，利用有限元分析程序计算了结合面刚度参数和结合面位置对结构模态的影响。
By using finite element analysis program, the models for computation of stiffness parameters of a specific structure with a fixed joint surface are developed.
开发的程序可以计算转子各阶模态振型与临界转速，进行稳定性的分析。
The program can calculate modal shapes and critical speeds, analyze the stability of the rotor system.
作者利用ANSYS有限元分析软件对一个平面桁架模型进行了模态分析，并用APDL语言编制程序计算该结构的柔度差值曲率。
ANSYS is used to make the modal analysis of a plane truss structure model, then APDL is used to compile procedures to calculate flexibility difference curvature.
频谱分析表明测试信号中含有两个主频，分别对应发射探头的发射主频与测试面自振频率（采用ANSYS有限元程序作半空间体模态分析加以验证）；
The signal's amplitude spectrum reveals that there are two main frequency, the higher is the probe signal's dominant frequency and the lower is the testing plane's free vibration frequency.
频谱分析表明测试信号中含有两个主频，分别对应发射探头的发射主频与测试面自振频率（采用ANSYS有限元程序作半空间体模态分析加以验证）；
The signal's amplitude spectrum reveals that there are two main frequency, the higher is the probe signal's dominant frequency and the lower is the testing plane's free vibration frequency.
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