基础激励结构的试验模态分析  

Experimental modal analysis of structures by base excitation

作　　者：吴家驹[1] 苏华昌[1] 王晓晖[1] 

机构地区：[1]北京强度环境研究所,北京100076

出　　处：《强度与环境》2010年第4期28-35,共8页Structure & Environment Engineering

摘　　要：阐述了基础激励结构的试验模态分析理论和原理,引进了结构响应和界面力方程。给出了结构约束状态和自由状态下的结构响应与基础激励之间的关系式。讨论了界面力的直接和间接测量方法。用一个四自由度集中参数模型对两种方法进行了原理性试验验证。The theory and the basic principles of experimental modal analysis of structures by base excitation are described.Equations for structural responses and the dynamic forces at interface are introduced.The relationship between the base excitation and structural responses is formulated for constraint and free boundary.The measure method of interface forces for direct and indirect method are discussed.Finally,a four degree of freedom lump parameter model is used principally to test and verify the presented method.

关 键 词：模态分析 基础激励 有效质量 视在质量 

分 类 号：V415.4[航空宇航科学与技术—航空宇航推进理论与工程]