用有限元素法分析转子-轴承系统动力学

 本文采用有限元素法分析转子-轴承系统的动力学问题。给出了模拟转子-轴承系统的动力分析程序（FEPRS程序）,该系统由刚性盘、弹性分布参量有限转子元素及离散轴承组成。用该程序能计算任何复杂转子系统在各种进动状态下的进动频率,并由计算机自动绘制相应的振型曲线。

DYNAMIC ANALYSIS OF ROTOR-BEARING SYSTEMS BY FINITE ELEMENT METHOD

The finite element, method is used to analyze dynamic problems of rotor-bearing systems. The system motion equations are presented in a fixed and a rotating coordinate systems. Nelson's element is extended to considering transverse shear effects, which are of great importance for complicated aircraft engines.A program （FEPRS） is presented for dynamic modelling of the rotor-bearing system which consists of rigid disks, distributed parameter finite rotor elements and discrete bearings. The whirl frequencies can be calculated for complicated rotor-bearing systems in various whirl states, and mode shapes can be automatically drawn by implementing this program on a computer. A lot of practical examples have been analyzed. The results are satisfactory in comparison with experimental data.