Also calculation of nonlinear response of bearing-rotor system under exciter of rotor eccentricity is carried out.Further more, mode number reserved in the process of calculation is discussed.

• 初步进行了不平衡偏心力下轴承转子系统的非线性动力响应计算，讨论了模态缩减中保留模态数的选取，动力响应计算结果表明转子系统失稳时发生次同步进动。