摘要
本文借助状态空间,采用摄动有限元法对不定参数结构进行了动力分析.将复模态的二次特征值问题化为一次特征值问题,对不定参数在某一确定值邻域内的摄动,利用二阶摄动的有限元方法通过一次性计算得到了结构复特征值,状态特征向量的一、二阶摄动公式。
This paper presents the analysing method on dynamic charactcrtics for unproportional viscous damping structure with parameter uncertainties. By use of second order perturbation finite method and changing two order complex eigenvalue into one order with state space, it obtains one and two order perturbation formulas of complex eig(?)nvalue and state vector in once calculation, when parameter uncertainties of a structure perturbate in the neighbourhood of a definite value.
基金
省自然科学基金资助项目
关键词
复模态
有限元
摄动
结构
动力分析
Complex method
Finite Element Method
Perturbation
Parameter Uncertainties
eigenvalue
