传递矩阵－多项式法的改进及其应用

An Improved Method for Calculating Stabilityof Rotor-Bearing-Squeezd Damper System

本文提出一种计算转子－滑动轴承－挤压油膜阻尼器转子系统的阻尼固有频率及稳定性的方法，即将传递矩奉多项式法改进后，应用于这类具有分叉结点的系统，直接得到系统的特征多项式，然后用Ｂａｉｒｓｔｏｗ－Ｎｅｗｔｏｎ僻因子法求出全部特征根。本方法具有占内存少、计算速度快、数值稳定等特点，文中对一转子模型进行了计算，其结果与实测基本相符。

A method is described for calculating the threshold speed of instability and the damped criticalspeeds of multimass Rotor-Bearing-Squeezed Film Damper System which have cornponent structure. Itis shown that by modifying the basic transfer matrix method, a characteristic polynomial can be de-scribed for such complex system. The Bairstow-Bewton method is used to solve the polynomial equa-tion. To demonstrate the application of the method, a result is shown for a rotor model.