转子临界转速的机械导纳综合分析法

A Mechanical Mobility Synthetic Method for Calculating Critical Speeds of Rotors.

将转子分为若干段，化成由若干个子系统组成的振动系统，推导出了子系统机械导纳合成的计算公式，根据这些公式即可对子系统进行综合，求出振动系统总的机械导纳。计算各频率下系统的机械导纳值，画出导纳一频率曲线，根据曲线的峰值点。

A rotor is modelled as a vibratory system with many subsystems in this paper.The formulations for synthesizing the mechanical mobilities of the subsystems are given here. We can use these formulations to calculate the mobility values of the whole system at every frequency and draw any a mobility frequency curve.The natural frequencies of the system and the critical speeds of the rotor can be got by the peaks of the curve.