摘要
利用结构的循环对称特性 ,以矩阵摄动理论和复约束法、伪单元法为基础 ,提出结构动力修改的循环对称摄动新方法 ,通过对循环对称扇区模型的分析获得整个循环对称结构特征值和特征向量的变化 ,大规模减少了这类结构动力修改的计算工作量 ,大大提高了计算效率。算例证明方法正确、有效、简捷。
Analyzing the eigenvalues is the foundation of dynamic analysis and design in cyclic symmetric structure. Based on the matrix perturbation theory,the complex constraint method and pseudo-element method, a new matrix perturbation method of cyclic symmetry for structural dynamic modification in cyclic symmetric structure was presented. With the characteristics of cyclic symmetry in structure and through the analysis of the model of cyclic symmetric sector, the varieties of eigenvalues and eigenvectors of cyclic symmetric structure can be fully obtained, and the calculation work of structural dynamic modification in cyclic symmetric structure can be further reduced, and the efficiency of calculation can be greatly improved. The results show the correctness and efficiency of the new method, and its conciseness has been proved.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2004年第1期7-10,共4页
China Mechanical Engineering
基金
航空科学基金资助项目 (0 0 C53 0 18
关键词
结构动力修改
循环对称结构
矩阵摄动
特征值
特征向量
有限元法
structural dynamic modification
cyclic symmetric structure
matrix perturbation
eigenvalue
eigenvector
finite element method
