摘要
本文以复模态理论为基础,给出了非回转阻尼系统及阻尼回转系统结构参数有微小改变时,相应的复频率和复模态一阶、二阶摄动公式.这对动力优化设计和复模态参数识别十分有意义,而且还可研究结构中各种参数改变时对频率和模态影响的灵敏度.最后给出了两个算例.
The first-order and second-order perturbation formulae are developed for nongyroscopic damped systems and gyroscopic damped systems, where the perturbation arise from small changes in the structural parameters.The solution is based on the complex modes theory.The object is to obtain the eigensolution of the perturbed system without repeating the original computation cycle.Undoubtedly it is useful for dynamic optimal design and the identification of complex mode parameters.Finally two illustative numerical examples are presented.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
1989年第4期469-478,共10页
Journal of Harbin Engineering University
关键词
阻尼回转系统
矩阵摄动法
复模态参数
动力分析
gyroscopic damped system
matrix perturbation method
complex modes
dynamic analysis