摘要
根据作者提出的一种通用的矩阵摄动法，研究了从约束结构的地面共振试验结果中，提取自由－自由结构的模态参数的具体方法和步骤。几个不同的计算实例充分验证了本文方法合理可靠，具有足够的精度。
おn the eigenvalue problem of large complicated structures, there often exist three different cases: distinct, equal and nearly equal eigenvalues. To this end, in Ref. 6 a matrix perturbation method that is applicable to all these three cases has been put forward. In the present paper, by using this perturbation method, an analytical procedure is proposed to determine freefree modes from the experimentally determined vibration modes of restrained structures. Illustrative examples for different eigenvalue cases are given to demonstrate the validity of the technique.
出处
《地震工程与工程振动》
CSCD
北大核心
1998年第1期16-21,共6页
Earthquake Engineering and Engineering Dynamics
基金
广东省自然科学基金
西安交通大学国家重点实验室开放研究基金
