A bifurcation equation of the steady state main resonance was obtained based on the multiple scales method.
在此基础上，用多尺度法求得稳态下主共振的分岔方程。
The motion equation of nonlinear rotor-bearing system is established and the frequency responding equation is obtained by multiple-scales method.
建立非线性转子系统运动方程，利用多尺度法求得频率响应方程。
The motion equation of nonlinear rotor-bearing system is established and the frequency responding equation is obtained by multiple-scales method.
建立非线性转子系统运动方程，利用多尺度法求得频率响应方程。
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