虚材料结构的试验模态处理(Ⅰ)——广义伽略金法  

Modal process of pseudo-material structure test(Ⅰ)——generalized Galerkin method

作　　者：张德文[1] 王建民[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》2009年第5期7-18,共12页Structure & Environment Engineering

摘　　要：在实际工程,特别是航天工程中,进行模态试验的结构,有时被迫对其整体或局部的材料采用非真实的。如运载器做模态试验时,为了安全,经常用某种其它液体取代液氢液氧燃料。还有的为了经济性,采用某种亷价材料代替昂贵的真实材料来制造试验模拟件。这些都是虚材料结构的模态试验。它们的共同问题就是,如何利用虚材料结构的模态试验数据提取(辨识)到真实材料结构的试验模态和频率。为此建立了一种基于动柔度的广义伽略金法,该方法还可以用于特征值重分析工作。In practical engineering, especially in the aerospace project, the structure which carried out of modal testing, and sometimes forced their material in whole or in part the use of non-real. For the safety, we often use some other liquid to replace the liquid oxygen in the vehicle modal tests, also for the economy, we are instead of some cheap material expensive materials to make the real test case simulation. Material of structures is modal test of pseudo-material structure. Their common question is how to make use of the pseudo-material of modal test data extraction （identification） to the structure of real materials and the experimental modal frequencies, this article has set up a dynamic flexibility based on the generalized Galerkin method, the method can also be used in the eigen value analysis.

关 键 词：虚材料 模态试验 结构 

分 类 号：O241.82[理学—计算数学]