本文以大型汽轮发电机组及其框架基础为背景，利用阻抗匹配法，配合以Ｒｉｃｃａｔｉ传递矩阵法和模态分析法，进行了大型转子－轴承－基础系统的振动分析，取得了满意的结果。分析计算表明：这一方法简便、实用、灵活，它易于揭示整个系统的固有频率与转子、基础等子系统的固有频率之间的内在联系，这对于复合系统的动力分析是很有益处的。 文中给出了算例和结果分析。 In this paper, the vibration analysis of large-scale rotor-bearing-foundation system with the large-scale steam turbine-generator set and its frame foundation is carried out with impedance matching method, Riccati transfer matrix method and modal analysis method. Satisfactory results are obtained. The analysis shows that the method is simple, practical and flexible. It is easy to reveal the inherent relationship between the natural frequency of the whole system and the natural frequency of the rotor, foundation and other subsystems, which is very useful for the dynamic analysis of the complex system. In this paper, an example and result analysis are given.