试验模态分析及有限元相结合的方法识别结构的支承刚度

Identification of the Stiffness of the Supports of a Structure through Experimental Modal Analysis Combined with FEM

本文提出了用试验模态分析与有限元相结合的方法，通过对振型向量自由度的聚缩去识别结构的支承刚度．特别是当一个结构物（梁或者板）具有零频和重频时，此法能解决完全靠试验方法所带来的问题．

In this paper, the use of the experimental modal analysis (EMA) together with the finite element method (FEM) is proposed to indentify the stiffness of the supports, in which the condensation of the degree of freedom of the model vectors is employed. The presented technique can be applied to solving those problems which cannot be treated solely through experimental analysis especially when a structure has zero or multiple frequencies.