大型转子-轴承-基础系统振动的计算方法

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。

Calculation Methods for the Vibration of a Huge Rotor-Bearing-Foundation System

Taking a huge turbogenerator set as its background, this paper discusses the vibration analysis of such a system by using the impedance matching method, combined with the Riccati transfer matrix method and modal analysis, and satisfactory results are obtained. The methods, as shown by calculations, have the advantages of simplicity, practice and flexibility. In addition, the interrelations between the natural frequencies of the whole system and of the subsystems (rotor, foundations, etc. ) are easily revealed by the methods, and it is of benefit to the dynamic analysis of a compound system. Examples and results are given in the paper.