vibration modal frequency

In order to reduce the vibration, we first make a modal analysis of the handle of the walking tractor and find that the second modal frequency is coupled with the primary forcing frequency of the engine.

为了减小振动，首先对扶手架进行模态分析，发现了第二阶模态频率与发动机一阶惯性力频率耦合。

And modal parameters of self oscillation frequency, vibration mode and damp are precisely found.

并在模型试验中较准确地找出了结构的固有频率 、 振型、阻尼等模态参数.

Then through the modal analysis get output axis of frequency and vibration model, analyzes whether it is to produce resonance, ask out of output axis limit rotational speed and working speed compare.

然后通过模态分析得到输出轴的频率和振型，分析其是否产生共振变形，求出输出轴的极限转速和工作转速做比较。

Elliptical modal frequency of stator and vibration amplitude of core, frame and bearing house, and factor of isolated vibration are also given in the paper. These parameters are available for operation, design and manufacture of large turbine-generator.

给出了定子的椭圆固有频率，定子铁心、机座、轴承座的振动幅值及定子机座的隔振系数，可供600MW汽轮发电机运行及大型汽轮发电机组的设计和制造参考。