resonance speed

The coupling resonance criteria are obtained after the analysis of large amount of engine hot test rotating speed measurement data.

对某发动机大量热试转速数据作了分析，给出判断此类耦合谐振的判断依据。

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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。

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If lower mode damping is increased in order to limit the resonance amplitude, the rattle threshold speed will increase.

增大低阶模态阻尼，能够增大拍击门槛转速。

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It is indicated that the results of component mode synthesis are almost consistent with the results of the original system, and only small errors exist in the neighborhood of the third resonance speed area.

结果表明，模态综合法的计算结果与原系统的计算结果基本一致，仅在第三个共振转速区附近存在较小误差。

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Content of the free-radical were determined using the paramagnetic resonance method. Result shows that high speed steel cutter blade wear seriously during fiber cutting, its main wear mechanism is abrasion of TiO_2 particles in fibers.

结果表明：切割涤纶半消光纤维时，高速钢刀片的磨损很快，主要磨损机制为纤维中TiO2粒子的磨粒磨损；

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