多自由度系统复模态理论的摄动方法 (三)非对称系统复特征值问题的摄动迭代法  

A PERTURBATION METHOD FOR THE COMPLEX MODE THEORY OF MULTI-DOF LINEAR SYSTES (Ⅲ)A PERTURBATON ITERATIVE METHOD FOR THE COMPLEX EIGENVALUE PROBLEM OF THE NONSYMMETRICAL SYSTEMS

作　　者：李培均 郑兆昌[2] 

机构地区：[1]河北机电学院 [2]清华大学

出　　处：《应用力学学报》1990年第2期71-82,144,共12页Chinese Journal of Applied Mechanics

摘　　要：基于实模态理论和相应特征值计算方法,本文在位形空间中用摄动方法求解非对称系统的复特征值和复模态。为提高精度,增加了一个迭代格式。最后给出算例并讨论了计算精度和收敛性。In this paper, based on real mode theory associated with eigenvalue algorithm. an efficient perturbation method has been developed to obtain the complex eigen-solutions for nonsymmetrical system in configuration space. In order to improve the accuracy of the numerical results, an iterative scheme is presented The accuracy and convergence are illustrated by two numerical examples.

关 键 词：振动 复模态 摄动法 系统 模态 

分 类 号：O325[理学—一般力学与力学基础]