计及单元质量连续性和变截面特性的传递矩阵法

 <正> 转子-支承-机匣系统动力特性分析有限元法在分析中可以计及单元的质量连续分布特性和变截面特性,利用这一特点来改进工程中目前常用的等直截面无质量杆传递矩阵法(以下简称方法2)即可得到计及单元的质量连续性和变截面特性的传递矩阵法(以下简称方法1)。有限元法用于旋转机械动力特性分析时所采用的基本单元常为2结点杆单元或壳单元。

TRANSFER MATRIX METHOD ALLOWING FOR VARIATION OF SECTION PARAMETERS AND CONTINUITY OF MASS IN ELEMENT

A new approach based upon the finite element method is put forth to improve the currently used transfer matrix method. With the approach, the variation of section parameters and the continuity of mass in elements can be allowded for when using the transfer matrix method in analysing a rotor-bases system, thus more precise results of analysis will be gained without need of increasing much CPU time. Several useful conclusions supported by a few of detailed examples are also obtained.