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

作　　者：李享荣[1] 吴益敏[1] 张雷[1] 

机构地区：[1]上海大学,华东工业大学

出　　处：《上海大学学报（自然科学版）》1996年第3期274-281,共8页Journal of Shanghai University:Natural Science Edition

摘　　要：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.

关 键 词：试验模态分析 支承刚度 有限元 结构系统 梁 板 

分 类 号：O342[理学—固体力学]