有阻尼振动系统的自由界面子结构综合法  

Free-interface component mode synthesis methods for damped vibration systems

作　　者：何欢[1] 陈国平[1] 陆颖华[1] 

机构地区：[1]南京航空航天大学振动工程研究所,南京210016

出　　处：《计算力学学报》2009年第6期951-955,共5页Chinese Journal of Computational Mechanics

摘　　要：研究了阻尼振动系统的自由界面子结构综合法。为了在最终给出的系统综合方程中考虑剩余柔度矩阵的影响,本文利用质量矩阵、阻尼矩阵和结构保留模态矩阵构造了一种与保留模态矩阵加权正交的矩阵。在计算自由-自由结构的剩余柔度矩阵时,通过这种加权正交矩阵能够避免直接对子结构刚度矩阵的求逆运算。在此基础上提出了一种新的有阻尼振动系统的自由界面子结构综合法。算例分析表明,本文的方法具有很高的计算精度。This paper focuses on free-interface component mode synthesis methods for damped vibration systems. In order to accurately model the dynamics of the structure, the Residual flexibility matrix is calculated through a weighted-orthogonal matrix formulated in this paper. Since directly calculation of the inverse of the stiffness matrix can be avoided by using this weighted-orthogonal matrix, it is very useful to the synthesis of free substructures. Generalized conforming condition of the interface is discussed. Based on these studies, a new free interface components synthesis method for damping structure is developed. The validity of this method is demonstrated through numerical examples.

关 键 词：复模态 子结构 自由界面 模态综合法 

分 类 号：O322[理学—一般力学与力学基础]