理论分析表明，采用损耗因子在0.1至0.4之间的常用的橡胶O型圈，即可极大地降低一阶临界振动响应。

Theoretical results showed that EORD, using general elastomer O-rings with loss-factor between 0.1 and 0.4, was enough to reduce first critical response vibrations of the experimental rotor system.

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从松散与密实的概念入手，提出用临界孔隙比等参数判断散料的振动松散与密实效应，并进行了相关的实验研究和理论分析。

Beginning with the concept of loosening and compacting, the paper determines effect of vibration on loosening and compacting of dispersed media using such parameters as critical porosity.

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并利用转子支承都具有一定弹性的特点，通过改变转子支承刚度达到调整转子临界转速和振动形态的目的。

Then the critical rotate speed and vibration shape are changed by changing the supporting stiffness with the characters of flexibility of rotor.

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