The program can calculate modal shapes and critical speeds, analyze the stability of the rotor system.
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。
This experiment method has some reference value on testing the 3-dimension modal shapes of a structure by using a single scanning laser vibrometer.
该实验方法对于采用单头激光测振仪测试结构的三维整体模态具有一定的参考价值。
The modal parameters of the printed circuit board (PCB) were calculated using finite element method, and the weaknesses of PCB were found using effective modal masses and mode shapes.
采用有限元方法对印制电路板进行了模态分析，依据有效模态质量和模态振型分析了振动环境下配制电路板的薄弱环节。
Considering the incompleteness of measured structural mode shapes, the practical complete modal space theory is used to eliminate the influence of modal truncation error.
考虑到所测的结构模态是不完备的，应用完备模态空间理论将未测的结构高阶模态用等效高阶模态来代替从而消除模态截断误差的影响。
When the exciting force was constant the average level of sound radiation produced by modal vibration has a linear relationship with the level of mode shapes.
得出，当激振点不变时，激振力级的变化与振动模态辐射的平均声压级成线性关系；
The second test aims to a motor frame, we can conclude from the experiment that the instrument can analyze multiple modes of complex structure and display its modal vibration shapes.
其次对一摩托车架进行了试验模态分析，试验表明仪器能较好地分析出车架的多阶模态，并显示出其模态振型。
The second test aims to a motor frame, we can conclude from the experiment that the instrument can analyze multiple modes of complex structure and display its modal vibration shapes.
其次对一摩托车架进行了试验模态分析，试验表明仪器能较好地分析出车架的多阶模态，并显示出其模态振型。
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