摘要
分析不对称性对具有近频的对称结构振型的局部化影响。用一种近频摄动缩聚解使改变后(不对称)结构的振型与原始的(对称)结构的振型相联系,对于带子结构的对称结构导出一个简明的振型局部化判据。算例的数值结果证实,这个判据是有效的。
The asymmetric effect on the mode localization of a symmetric structure is analyzed.A reduc- tion solution for closely spaced frequency perturbation is used to relate modes of perturbed(asymmetric) structure and modes of original(symmetric)structure.A simple criterion for the occurrence of mode local- ization is derived for a symmetric structure with substructures.Numerical results of illustrative examples confirm that the criterion is feasible.
出处
《振动工程学报》
EI
CSCD
1996年第2期186-190,共5页
Journal of Vibration Engineering
关键词
结构振动
对称性破坏
振型
局部化
对称结构
structural vibration
symmetry breaking
mode localization
symmetric structure
nearly equal frequency perturbation
