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在齿轮耦合的转子──轴承系统中，影响系统动力特性的因素很多，只研究了轴承组合形式、间隙比及宽径比对系统失稳转速、涡动比、临界转速及其分布以及系统阻尼特性的影响。发现在该系统中，存在着系统稳定运行的薄弱环节，当轴承组合形式、间隙比及宽径比产生变化时，系统的失稳转速也将产生变化，并表现出不同的阻尼特性。提出了用最小对数衰减率衡量系统跨越临界转速的能力，用涡动比判断哪个子系统首先失稳。
In the gear-coupled rotor ─ ─ bearing system, there are many factors that affect the dynamic characteristics of the system. Only the combination of bearing, clearance ratio and width-to-diameter ratio have been used to study the effects of system instability speed, vortex ratio, critical speed and its distribution and system damping Effect of characteristics. It is found that there is a weak link in the stable operation of the system. When the bearing combination, clearance ratio and width-to-diameter ratio change, the instability speed of the system will also change and exhibit different damping characteristics. The minimum logarithmic decay rate is used to measure the ability of the system to cross the critical speed. The vortex ratio is used to judge which subsystem is not stable first.